diff --git a/custom_ops/xpu_ops/src/ops/limit_thinking_content_length_v1.cc b/custom_ops/xpu_ops/src/ops/limit_thinking_content_length_v1.cc
new file mode 100644
index 000000000..3a4a6eefc
--- /dev/null
+++ b/custom_ops/xpu_ops/src/ops/limit_thinking_content_length_v1.cc
@@ -0,0 +1,52 @@
+// Copyright (c) 2025 PaddlePaddle Authors. All Rights Reserved.
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//     http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+#include <paddle/phi/backends/xpu/xpu_context.h>
+#include "paddle/extension.h"
+#include "paddle/phi/core/enforce.h"
+#include "xpu/plugin.h"
+
+#ifndef PD_BUILD_STATIC_OP
+#define PD_BUILD_STATIC_OP(name) PD_BUILD_OP(static_op_##name)
+#endif
+
+void LimitThinkingContentLengthV1(const paddle::Tensor& next_tokens,
+                                  const paddle::Tensor& max_think_lens,
+                                  const paddle::Tensor& step_idx,
+                                  const paddle::Tensor& limit_think_status,
+                                  const int64_t think_end_id) {
+  phi::XPUPlace place(phi::backends::xpu::GetXPUCurrentDeviceId());
+  auto dev_ctx = paddle::experimental::DeviceContextPool::Instance().Get(place);
+  auto xpu_ctx = static_cast<const phi::XPUContext*>(dev_ctx);
+
+  const int batch_size = next_tokens.shape()[0];
+  int r = baidu::xpu::api::plugin::limit_thinking_content_length_kernel_v1(
+      xpu_ctx->x_context(),
+      const_cast<int64_t*>(next_tokens.data<int64_t>()),
+      max_think_lens.data<int>(),
+      step_idx.data<int64_t>(),
+      const_cast<int*>(limit_think_status.data<int>()),
+      think_end_id,
+      batch_size);
+  PD_CHECK(r == 0,
+           "baidu::xpu::api::plugin::limit_thinking_content_length_kernel_v1 "
+           "failed.");
+}
+
+PD_BUILD_STATIC_OP(limit_thinking_content_length_v1)
+    .Inputs({"next_tokens", "max_think_lens", "step_idx", "limit_think_status"})
+    .Attrs({"think_end_id: int64_t"})
+    .Outputs({"next_tokens_out"})
+    .SetInplaceMap({{"next_tokens", "next_tokens_out"}})
+    .SetKernelFn(PD_KERNEL(LimitThinkingContentLengthV1));
diff --git a/custom_ops/xpu_ops/src/ops/limit_thinking_content_length_v2.cc b/custom_ops/xpu_ops/src/ops/limit_thinking_content_length_v2.cc
new file mode 100644
index 000000000..fdf60b1da
--- /dev/null
+++ b/custom_ops/xpu_ops/src/ops/limit_thinking_content_length_v2.cc
@@ -0,0 +1,54 @@
+// Copyright (c) 2025 PaddlePaddle Authors. All Rights Reserved.
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//     http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+#include <paddle/phi/backends/xpu/xpu_context.h>
+#include "paddle/extension.h"
+#include "paddle/phi/core/enforce.h"
+#include "xpu/plugin.h"
+
+#ifndef PD_BUILD_STATIC_OP
+#define PD_BUILD_STATIC_OP(name) PD_BUILD_OP(static_op_##name)
+#endif
+
+void LimitThinkingContentLengthV2(const paddle::Tensor& next_tokens,
+                                  const paddle::Tensor& max_think_lens,
+                                  const paddle::Tensor& step_idx,
+                                  const paddle::Tensor& limit_think_status,
+                                  const int64_t think_end_id,
+                                  const int64_t line_break_id) {
+  phi::XPUPlace place(phi::backends::xpu::GetXPUCurrentDeviceId());
+  auto dev_ctx = paddle::experimental::DeviceContextPool::Instance().Get(place);
+  auto xpu_ctx = static_cast<const phi::XPUContext*>(dev_ctx);
+
+  const int batch_size = next_tokens.shape()[0];
+  int r = baidu::xpu::api::plugin::limit_thinking_content_length_kernel_v2(
+      xpu_ctx->x_context(),
+      const_cast<int64_t*>(next_tokens.data<int64_t>()),
+      max_think_lens.data<int>(),
+      step_idx.data<int64_t>(),
+      const_cast<int*>(limit_think_status.data<int>()),
+      think_end_id,
+      line_break_id,
+      batch_size);
+  PD_CHECK(r == 0,
+           "baidu::xpu::api::plugin::limit_thinking_content_length_kernel_v2 "
+           "failed.");
+}
+
+PD_BUILD_STATIC_OP(limit_thinking_content_length_v2)
+    .Inputs({"next_tokens", "max_think_lens", "step_idx", "limit_think_status"})
+    .Attrs({"think_end_id: int64_t", "line_break_id: int64_t"})
+    .Outputs({"next_tokens_out"})
+    .SetInplaceMap({{"next_tokens", "next_tokens_out"}})
+    .SetKernelFn(PD_KERNEL(LimitThinkingContentLengthV2));
diff --git a/custom_ops/xpu_ops/src/plugin/include/xpu/plugin.h b/custom_ops/xpu_ops/src/plugin/include/xpu/plugin.h
index a399e5315..971493d56 100644
--- a/custom_ops/xpu_ops/src/plugin/include/xpu/plugin.h
+++ b/custom_ops/xpu_ops/src/plugin/include/xpu/plugin.h
@@ -215,6 +215,25 @@ DLL_EXPORT int text_image_gather_scatter(api::Context* ctx,
                                          int64_t hidden_size,
                                          bool is_scatter);
 
+DLL_EXPORT int limit_thinking_content_length_kernel_v1(
+    api::Context* ctx,
+    int64_t* next_tokens,
+    const int* max_think_lens,
+    const int64_t* step_idx,
+    int* limit_think_status,
+    const int64_t think_end_id,
+    const int bs);
+
+DLL_EXPORT int limit_thinking_content_length_kernel_v2(
+    api::Context* ctx,
+    int64_t* next_tokens,
+    const int* max_think_lens,
+    const int64_t* step_idx,
+    int* limit_think_status,
+    const int64_t think_end_id,
+    const int64_t line_break_id,
+    const int bs);
+
 /*--------------------------------------- MTP being
  * --------------------------------------------*/
 
diff --git a/custom_ops/xpu_ops/src/plugin/src/kernel/kunlun3cpp/limit_thinking_content_length_v1.xpu b/custom_ops/xpu_ops/src/plugin/src/kernel/kunlun3cpp/limit_thinking_content_length_v1.xpu
new file mode 100644
index 000000000..bcd61879e
--- /dev/null
+++ b/custom_ops/xpu_ops/src/plugin/src/kernel/kunlun3cpp/limit_thinking_content_length_v1.xpu
@@ -0,0 +1,73 @@
+#include "xpu/kernel/cluster.h"
+#include "xpu/kernel/cluster_partition.h"
+#include "xpu/kernel/cluster_primitive.h"
+// #include <stdio.h>
+// using namespace std;
+
+#include "xpu/kernel/xtdk.h"
+#include "xpu/kernel/xtdk_io.h"
+
+namespace xpu3 {
+namespace plugin {
+
+__global__ void limit_thinking_content_length_kernel_v1(
+    int64_t* next_tokens,
+    const int* max_think_lens,
+    const int64_t* step_idx,
+    int* limit_think_status,
+    const int64_t think_end_id,
+    const int bs) {
+  int cid = core_id();
+  int ncores = core_num();
+  int clusterid = cluster_id();
+  int nclusters = cluster_num();
+  if (clusterid != 0) return;
+
+  for (int i = cid; i < bs; i += ncores) {
+    int max_think_len_lm;
+    int limit_think_status_lm;
+    int64_t next_token_lm;
+    int64_t step_idx_lm;
+    GM2LM_ASYNC(next_tokens + i, &next_token_lm, sizeof(int64_t));
+    GM2LM_ASYNC(step_idx + i, &step_idx_lm, sizeof(int64_t));
+    GM2LM_ASYNC(max_think_lens + i, &max_think_len_lm, sizeof(int));
+    GM2LM(limit_think_status + i, &limit_think_status_lm, sizeof(int));
+
+    // 如果该序列未启用思考功能，则直接返回，默认值为 -1，表示不限制思考长度
+    if (max_think_len_lm < 0) continue;
+    // 如果在回复阶段, 且已经触发停止标志, 则直接返回, 无需多余执行.
+    if (limit_think_status_lm == 2) continue;
+
+    // ======================= 思考阶段控制 =======================
+    // 阶段 1: 仍在思考 (status == 0), 检查是否需要强制结束
+    if (limit_think_status_lm < 1) {
+      // 当开启思考长度控制时，检查是否超时
+      if (step_idx_lm >= max_think_len_lm) {
+        // 强制将当前token替换为结束思考的token
+        next_token_lm = think_end_id;
+        // 将状态推进到 1, 表示 "正在结束思考"
+        limit_think_status_lm = 1;
+      }
+    }
+
+    // ======================= 思考结束处理 =======================
+    // 阶段 2: 检查是否已满足结束思考的条件 (status < 2)
+    // 这种情况会处理两种场景:
+    // 1. status == 0: 模型自己生成了 think_end_id
+    // 2. status == 1: 上一阶段强制注入了 think_end_id
+    if (limit_think_status_lm < 2) {
+      if (next_token_lm == think_end_id) {
+        // 确认思考结束，将状态推进到 2 (响应阶段)
+        limit_think_status_lm = 2;
+      }
+    }
+
+    // 写回更新后的 token
+    LM2GM_ASYNC(&next_token_lm, next_tokens + i, sizeof(int64_t));
+    // 更新全局状态
+    LM2GM(&limit_think_status_lm, limit_think_status + i, sizeof(int));
+  }
+}
+
+}  // namespace plugin
+}  // namespace xpu3
diff --git a/custom_ops/xpu_ops/src/plugin/src/kernel/kunlun3cpp/limit_thinking_content_length_v2.xpu b/custom_ops/xpu_ops/src/plugin/src/kernel/kunlun3cpp/limit_thinking_content_length_v2.xpu
new file mode 100644
index 000000000..239f8dd92
--- /dev/null
+++ b/custom_ops/xpu_ops/src/plugin/src/kernel/kunlun3cpp/limit_thinking_content_length_v2.xpu
@@ -0,0 +1,90 @@
+#include "xpu/kernel/cluster.h"
+#include "xpu/kernel/cluster_partition.h"
+#include "xpu/kernel/cluster_primitive.h"
+// #include <stdio.h>
+// using namespace std;
+
+#include "xpu/kernel/xtdk.h"
+#include "xpu/kernel/xtdk_io.h"
+
+namespace xpu3 {
+namespace plugin {
+
+__global__ void limit_thinking_content_length_kernel_v2(
+    int64_t* next_tokens,
+    const int* max_think_lens,
+    const int64_t* step_idx,
+    int* limit_think_status,
+    const int64_t think_end_id,
+    const int64_t line_break_id,
+    const int bs) {
+  int cid = core_id();
+  int ncores = core_num();
+  int clusterid = cluster_id();
+  int nclusters = cluster_num();
+  if (clusterid != 0) return;
+
+  for (int i = cid; i < bs; i += ncores) {
+    int max_think_len_lm;
+    int limit_think_status_lm;
+    int64_t next_token_lm;
+    int64_t step_idx_lm;
+    GM2LM_ASYNC(next_tokens + i, &next_token_lm, sizeof(int64_t));
+    GM2LM_ASYNC(step_idx + i, &step_idx_lm, sizeof(int64_t));
+    GM2LM_ASYNC(max_think_lens + i, &max_think_len_lm, sizeof(int));
+    GM2LM(limit_think_status + i, &limit_think_status_lm, sizeof(int));
+
+    // 如果该序列未启用思考功能，则直接返回，默认值为 -1，表示不限制思考长度
+    if (max_think_len_lm < 0) continue;
+    // 如果在回复阶段, 且已经触发停止标志, 则直接返回, 无需多余执行.
+    if (limit_think_status_lm == 3) continue;
+
+    // ======================= 思考阶段控制 =======================
+    // 阶段 1: 仍在思考 (status == 0), 检查是否需要强制结束
+    // 阶段 2: 在替换 (status == 1), 检查是否替换结束
+    if (limit_think_status_lm <= 1) {
+      // 当开启思考长度控制时，检查是否超时
+      if (step_idx_lm == max_think_len_lm) {
+        // 强制将当前token替换为结束思考的token
+        next_token_lm = line_break_id;
+        limit_think_status_lm = 1;
+      } else if (step_idx_lm == max_think_len_lm + 1) {
+        // 强制将当前token替换为结束思考的token
+        next_token_lm = think_end_id;
+        limit_think_status_lm = 1;
+      } else if (step_idx_lm == max_think_len_lm + 2) {
+        // 强制将当前token替换为结束思考的token
+        next_token_lm = line_break_id;
+        limit_think_status_lm = 1;
+      } else if (step_idx_lm == max_think_len_lm + 2) {
+        // 强制将当前token替换为结束思考的token
+        next_token_lm = line_break_id;
+        limit_think_status_lm = 2;
+      }
+    }
+
+    // ======================= 思考结束处理 =======================
+    // 阶段 3: 检查是否已满足结束思考的条件 (status == 0 || status == 2)
+    // 这种情况会处理两种场景:
+    // 1. status == 0: 模型可能自己生成了 </think>
+    // 2. status == 2: 上一阶段强制注入了 \n</think>\n\n
+    if (limit_think_status_lm == 0) {
+      if (next_token_lm == think_end_id) {
+        // 确认思考结束，将状态推进到 3 (响应阶段)
+        limit_think_status_lm = 3;
+      }
+    }
+    if (limit_think_status_lm == 2) {
+      // 确认思考结束，将状态推进到 3 (响应阶段)
+      limit_think_status_lm = 3;
+    }
+
+    // 写回更新后的 token
+    LM2GM_ASYNC(&next_token_lm, next_tokens + i, sizeof(int64_t));
+    // 更新全局状态
+    LM2GM(&limit_think_status_lm, limit_think_status + i, sizeof(int));
+  }
+}
+
+}  // namespace plugin
+}  // namespace xpu3
diff --git a/custom_ops/xpu_ops/src/plugin/src/wrapper/limit_thinking_content_length_v1.cpp b/custom_ops/xpu_ops/src/plugin/src/wrapper/limit_thinking_content_length_v1.cpp
new file mode 100644
index 000000000..57eb02efb
--- /dev/null
+++ b/custom_ops/xpu_ops/src/plugin/src/wrapper/limit_thinking_content_length_v1.cpp
@@ -0,0 +1,95 @@
+// Copyright (c) 2025 PaddlePaddle Authors. All Rights Reserved.
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//     http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+#include <algorithm>
+#include <numeric>
+#include "xpu/plugin.h"
+#include "xpu/refactor/impl_public/wrapper_check.h"
+
+namespace xpu3 {
+namespace plugin {
+
+__attribute__((global)) void limit_thinking_content_length_kernel_v1(
+    int64_t* next_tokens,
+    const int* max_think_lens,
+    const int64_t* step_idx,
+    int* limit_think_status,
+    const int64_t think_end_id,
+    const int bs);
+
+}  // namespace plugin
+}  // namespace xpu3
+
+namespace baidu {
+namespace xpu {
+namespace api {
+namespace plugin {
+
+static int xpu3_wrapper(Context* ctx,
+                        int64_t* next_tokens,
+                        const int* max_think_lens,
+                        const int64_t* step_idx,
+                        int* limit_think_status,
+                        const int64_t think_end_id,
+                        const int bs) {
+  using XPU_INT64 = typename XPUIndexType<int64_t>::type;
+  auto limit_thinking_content_length_kernel_v1 =
+      xpu3::plugin::limit_thinking_content_length_kernel_v1;
+  limit_thinking_content_length_kernel_v1<<<1, 64, ctx->xpu_stream>>>(
+      reinterpret_cast<XPU_INT64*>(next_tokens),
+      max_think_lens,
+      reinterpret_cast<const XPU_INT64*>(step_idx),
+      limit_think_status,
+      think_end_id,
+      bs);
+  return api::SUCCESS;
+}
+
+int limit_thinking_content_length_kernel_v1(Context* ctx,
+                                            int64_t* next_tokens,
+                                            const int* max_think_lens,
+                                            const int64_t* step_idx,
+                                            int* limit_think_status,
+                                            const int64_t think_end_id,
+                                            const int bs) {
+  WRAPPER_CHECK_CTX(ctx);
+  WRAPPER_DUMP_FUNCTION_T1(ctx, "limit_thinking_content_length_kernel_v1", int);
+  WRAPPER_DUMP_PARAM5(ctx,
+                      next_tokens,
+                      max_think_lens,
+                      step_idx,
+                      limit_think_status,
+                      think_end_id);
+  WRAPPER_DUMP_PARAM1(ctx, bs);
+
+  WRAPPER_DUMP(ctx);
+  if (ctx->dev().type() == api::kCPU) {
+    assert(false);
+  }
+  if (ctx->dev().type() == api::kXPU2 || ctx->dev().type() == api::kXPU3) {
+    return xpu3_wrapper(ctx,
+                        next_tokens,
+                        max_think_lens,
+                        step_idx,
+                        limit_think_status,
+                        think_end_id,
+                        bs);
+  }
+  WRAPPER_UNIMPLEMENTED(ctx);
+}
+
+}  // namespace plugin
+}  // namespace api
+}  // namespace xpu
+}  // namespace baidu
diff --git a/custom_ops/xpu_ops/src/plugin/src/wrapper/limit_thinking_content_length_v2.cpp b/custom_ops/xpu_ops/src/plugin/src/wrapper/limit_thinking_content_length_v2.cpp
new file mode 100644
index 000000000..242e0ec24
--- /dev/null
+++ b/custom_ops/xpu_ops/src/plugin/src/wrapper/limit_thinking_content_length_v2.cpp
@@ -0,0 +1,99 @@
+// Copyright (c) 2025 PaddlePaddle Authors. All Rights Reserved.
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//     http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+#include <algorithm>
+#include <numeric>
+#include "xpu/plugin.h"
+#include "xpu/refactor/impl_public/wrapper_check.h"
+
+namespace xpu3 {
+namespace plugin {
+
+__attribute__((global)) void limit_thinking_content_length_kernel_v2(
+    int64_t* next_tokens,
+    const int* max_think_lens,
+    const int64_t* step_idx,
+    int* limit_think_status,
+    const int64_t think_end_id,
+    const int64_t line_break_id,
+    const int bs);
+
+}  // namespace plugin
+}  // namespace xpu3
+
+namespace baidu {
+namespace xpu {
+namespace api {
+namespace plugin {
+
+static int xpu3_wrapper(Context* ctx,
+                        int64_t* next_tokens,
+                        const int* max_think_lens,
+                        const int64_t* step_idx,
+                        int* limit_think_status,
+                        const int64_t think_end_id,
+                        const int64_t line_break_id,
+                        const int bs) {
+  using XPU_INT64 = typename XPUIndexType<int64_t>::type;
+  auto limit_thinking_content_length_kernel_v2 =
+      xpu3::plugin::limit_thinking_content_length_kernel_v2;
+  limit_thinking_content_length_kernel_v2<<<1, 64, ctx->xpu_stream>>>(
+      reinterpret_cast<XPU_INT64*>(next_tokens),
+      max_think_lens,
+      reinterpret_cast<const XPU_INT64*>(step_idx),
+      limit_think_status,
+      think_end_id,
+      line_break_id,
+      bs);
+  return api::SUCCESS;
+}
+
+int limit_thinking_content_length_kernel_v2(Context* ctx,
+                                            int64_t* next_tokens,
+                                            const int* max_think_lens,
+                                            const int64_t* step_idx,
+                                            int* limit_think_status,
+                                            const int64_t think_end_id,
+                                            const int64_t line_break_id,
+                                            const int bs) {
+  WRAPPER_CHECK_CTX(ctx);
+  WRAPPER_DUMP_FUNCTION_T1(ctx, "limit_thinking_content_length_kernel_v2", int);
+  WRAPPER_DUMP_PARAM5(ctx,
+                      next_tokens,
+                      max_think_lens,
+                      step_idx,
+                      limit_think_status,
+                      think_end_id);
+  WRAPPER_DUMP_PARAM2(ctx, line_break_id, bs);
+  WRAPPER_DUMP(ctx);
+  if (ctx->dev().type() == api::kCPU) {
+    assert(false);
+  }
+  if (ctx->dev().type() == api::kXPU2 || ctx->dev().type() == api::kXPU3) {
+    return xpu3_wrapper(ctx,
+                        next_tokens,
+                        max_think_lens,
+                        step_idx,
+                        limit_think_status,
+                        think_end_id,
+                        line_break_id,
+                        bs);
+  }
+  WRAPPER_UNIMPLEMENTED(ctx);
+}
+
+}  // namespace plugin
+}  // namespace api
+}  // namespace xpu
+}  // namespace baidu
diff --git a/fastdeploy/worker/xpu_model_runner.py b/fastdeploy/worker/xpu_model_runner.py
index 0f05f2dc6..2418e24c0 100644
--- a/fastdeploy/worker/xpu_model_runner.py
+++ b/fastdeploy/worker/xpu_model_runner.py
@@ -45,6 +45,8 @@ from fastdeploy.model_executor.ops.xpu import (
     adjust_batch,
     get_infer_param,
     get_padding_offset,
+    limit_thinking_content_length_v1,
+    limit_thinking_content_length_v2,
     recover_decode_task,
     set_data_ipc,
     share_external_data,
@@ -185,6 +187,8 @@ def xpu_post_process(
     share_inputs: Dict[str, paddle.Tensor],
     block_size: int = 64,
     skip_save_output: bool = False,
+    think_end_id: int = None,
+    line_break_id: int = None,
 ) -> None:
     """ """
     from fastdeploy.model_executor.ops.xpu import (
@@ -193,6 +197,34 @@ def xpu_post_process(
         update_inputs,
     )
 
+    if think_end_id > 0:
+        limit_strategy = envs.FD_LIMIT_THINKING_CONTENT_TRUNCATE_STR
+        max_think_lens = share_inputs["max_think_lens"]
+        step_idx = share_inputs["step_idx"]
+        limit_think_status = share_inputs["limit_think_status"]
+        if limit_strategy == "</think>":
+            # for ernie4_5_vl
+            limit_thinking_content_length_v1(
+                sampled_token_ids,
+                max_think_lens,
+                step_idx,
+                limit_think_status,
+                think_end_id,
+            )
+        elif limit_strategy == "\n</think>\n\n":
+            # for ernie_x1
+            assert line_break_id > 0
+            limit_thinking_content_length_v2(
+                sampled_token_ids,
+                max_think_lens,
+                step_idx,
+                limit_think_status,
+                think_end_id,
+                line_break_id,
+            )
+        else:
+            raise NotImplementedError(f"Not support {limit_strategy=} for limit thinking content length.")
+
     # 1. Set stop value
     paddle.assign(
         paddle.where(
@@ -431,6 +463,15 @@ class XPUModelRunner(ModelRunnerBase):
                         position_ids, request.get("max_tokens", 2048)
                     )
 
+                if request.get("enable_thinking", False) and request.get("reasoning_max_tokens", None) is not None:
+                    # Enable thinking
+                    self.share_inputs["max_think_lens"][idx : idx + 1, :] = request.get("reasoning_max_tokens")
+                    self.share_inputs["limit_think_status"][idx : idx + 1, :] = 0
+                else:
+                    # Disable thinking
+                    self.share_inputs["max_think_lens"][idx : idx + 1, :] = -1
+                    self.share_inputs["limit_think_status"][idx : idx + 1, :] = 0
+
                 if len(request.output_token_ids) == 0:
                     input_ids = request.prompt_token_ids
                 else:
@@ -566,6 +607,15 @@ class XPUModelRunner(ModelRunnerBase):
                 )
                 self.share_inputs["seq_lens_decoder"][idx : idx + 1] = 0
 
+            if request.get("enable_thinking", False) and request.get("reasoning_max_tokens", None) is not None:
+                # Enable thinking
+                self.share_inputs["max_think_lens"][idx : idx + 1, :] = request.get("reasoning_max_tokens")
+                self.share_inputs["limit_think_status"][idx : idx + 1, :] = 0
+            else:
+                # Disable thinking
+                self.share_inputs["max_think_lens"][idx : idx + 1, :] = -1
+                self.share_inputs["limit_think_status"][idx : idx + 1, :] = 0
+
             def get_attr_from_request(request, attr, default_value=None):
                 res = request.get(attr, default_value)
                 if res is not None:
@@ -712,6 +762,10 @@ class XPUModelRunner(ModelRunnerBase):
         self.share_inputs["system_lens"] = paddle.full([max_num_seqs, 1], 0, dtype="int32")
         self.share_inputs["system_ids"] = paddle.full([max_num_seqs, 1], -1, dtype="int32")
 
+        # Initialize thinking related buffers
+        self.share_inputs["max_think_lens"] = paddle.full(shape=[max_num_seqs, 1], fill_value=-1, dtype="int32")
+        self.share_inputs["limit_think_status"] = paddle.full(shape=[max_num_seqs, 1], fill_value=0, dtype="int32")
+
         # Initialize rotary position embedding
         tmp_position_ids = paddle.arange(self.model_config.max_model_len).reshape((1, -1))
 
@@ -1111,6 +1165,8 @@ class XPUModelRunner(ModelRunnerBase):
             share_inputs=self.share_inputs,
             block_size=self.cache_config.block_size,
             skip_save_output=is_dummy_run,
+            think_end_id=self.model_config.think_end_id,
+            line_break_id=self.model_config.line_break_id,
         )
 
         # 7. Updata 'infer_seed' and step_paddle()