diff --git a/fastdeploy/runtime/backends/paddle/paddle_backend.cc b/fastdeploy/runtime/backends/paddle/paddle_backend.cc
index e0e908c36..19493f90b 100644
--- a/fastdeploy/runtime/backends/paddle/paddle_backend.cc
+++ b/fastdeploy/runtime/backends/paddle/paddle_backend.cc
@@ -44,6 +44,7 @@ void PaddleBackend::BuildOption(const PaddleBackendOption& option) {
                "file will save to the directory where paddle model saved."
             << std::endl;
         use_static = true;
+        config_.SetOptimCacheDir(option.trt_option.serialize_file);
       }
       config_.EnableTensorRtEngine(option.trt_option.max_workspace_size,
                                    option.trt_option.max_batch_size, 3,