diff --git a/install/deb/src/main.c b/install/deb/src/main.c
index 3bf11ad..7553a60 100644
--- a/install/deb/src/main.c
+++ b/install/deb/src/main.c
@@ -14,7 +14,13 @@
 #define CMD_INDEX 1
 #define FINAL_FILE_INDEX 2
 #define TEMP_FILE_INDEX 3
-#define PATH_VALUE "/usr/local/bin/ascend-docker-runtime"
+#define ASCEND_RUNTIME_PATH_VALUE "/usr/local/bin/ascend-docker-runtime"
+#define ASCEND_RUNTIME_PATH_KEY "path"
+#define ASCEND_RUNTIME_ARGS_KEY "runtimeArgs"
+#define RUNTIME_KEY "runtimes"
+#define ASCEND_RUNTIME_NAME "ascend"
+#define DEFALUT_KEY "default-runtime"
+#define DEFAULT_VALUE "ascend"
 
 void ReadJsonFile(const FILE *pf, char *text, int maxBufferSize)
 {
@@ -31,80 +37,200 @@ void ReadJsonFile(const FILE *pf, char *text, int maxBufferSize)
     text[size] = '\0';
 }
 
-int CreateNode(cJSON *runtimes)
-{ 
-    cJSON *node = cJSON_GetObjectItem(runtimes, "ascend");
-    if (node != NULL) {
-        return 0;
-    }
-
-    cJSON *newItem = NULL;
-    newItem = cJSON_CreateObject();
-    if (newItem == NULL) {
-        return -1;
-    }
-    cJSON_AddItemToObject(runtimes, "ascend", newItem);
-
-    cJSON *paraArray = NULL;
-    paraArray = cJSON_CreateArray();
-    if (paraArray == NULL) {
-        return -1;
-    }
-    
-    cJSON_AddItemToObject(newItem, "path", cJSON_CreateString(PATH_VALUE));
-    cJSON_AddItemToObject(newItem, "runtimeArgs", paraArray);
-
-    return 0;
-}
-
-int CreateRuntimes(cJSON *root)
-{
-    cJSON *runtimes = cJSON_CreateObject();
-    if (runtimes == NULL) {
-        return -1;
-    }
-    cJSON_AddItemToObject(root, "runtimes", runtimes);
-    return CreateNode(runtimes);
-}
-
-cJSON *CreateContent()
+cJSON *CreateAscendRuntimeInfo()
 {
     cJSON *root = NULL; 
     root = cJSON_CreateObject();
     if (root == NULL) {
+        fprintf(stderr, "create ascend runtime info root err\n");
         return NULL;
     }
     
-    int ret = CreateRuntimes(root);
-    if (ret != 0) {
+    cJSON *newString = NULL; 
+    newString = cJSON_CreateString(ASCEND_RUNTIME_PATH_VALUE);
+    if (newString == NULL) {
+        fprintf(stderr, "create ascend runtime info path value err\n");
+        cJSON_Delete(root);
         return NULL;
     }
     
+    cJSON *paraArray = NULL;
+    paraArray = cJSON_CreateArray();
+    if (paraArray == NULL) {
+        fprintf(stderr, "create ascend runtime info args err\n");
+        cJSON_Delete(root);
+        cJSON_Delete(newString);
+        return NULL;
+    }
+
+    cJSON_AddItemToObject(root, ASCEND_RUNTIME_PATH_KEY, newString);
+    cJSON_AddItemToObject(root, ASCEND_RUNTIME_ARGS_KEY, paraArray);
+
+    return root;
+}
+
+cJSON *CreateRuntimes()
+{
+    cJSON *ascendRuntime = NULL;
+    ascendRuntime = CreateAscendRuntimeInfo(); 
+    if (ascendRuntime == NULL) {
+        fprintf(stderr, "create ascendruntime err\n");
+        return NULL;
+    }
+
+    cJSON *runtimes = NULL;
+    runtimes = cJSON_CreateObject();
+    if (runtimes == NULL) {
+        fprintf(stderr, "create runtimes err\n");
+        cJSON_Delete(ascendRuntime);
+        return NULL;
+    }
+
+    cJSON_AddItemToObject(runtimes, ASCEND_RUNTIME_NAME, ascendRuntime);
+
+    return runtimes;
+}
+
+int DelJsonContent(cJSON *root, const char *key)
+{
+    cJSON *existItem = NULL;
+    existItem = cJSON_GetObjectItem(root, key);
+    if (existItem == NULL) {       
+        return 0;
+    }
+
+    cJSON *removedItem = NULL; 
+    removedItem = cJSON_DetachItemViaPointer(root, existItem);
+    if (removedItem == NULL) {
+        fprintf(stderr, "remove %s failed\n", key);
+        return -1;
+    }
+
+    cJSON_Delete(removedItem);    
+    return 0;
+}
+
+cJSON *CreateContent()
+{   
+    /* 插入ascend runtime */
+    cJSON *runtimes = NULL;
+    runtimes = CreateRuntimes();
+    if (runtimes == NULL) {
+        fprintf(stderr, "create runtimes err\n");
+        return NULL;
+    }
+
+    cJSON *defaultRuntime = NULL;
+    defaultRuntime = cJSON_CreateString(DEFAULT_VALUE);
+    if (defaultRuntime == NULL) {
+        cJSON_Delete(runtimes);
+        return NULL;
+    }
+
+    cJSON *root = NULL;
+    root = cJSON_CreateObject();
+    if (root == NULL) {
+        /* ascendRuntime已经挂载到runtimes上了，再释放会coredump */
+        fprintf(stderr, "create root err\n");
+        cJSON_Delete(runtimes);
+        cJSON_Delete(defaultRuntime);
+        return NULL;
+    }
+
+    cJSON_AddItemToObject(root, RUNTIME_KEY, runtimes);
+
+    cJSON_AddItemToObject(root, DEFALUT_KEY, defaultRuntime);
+
+    return root;
+}
+
+cJSON *ModifyContent(const FILE *pf)
+{
+    char jsonStr[MAX_JSON_FILE_SIZE] = {0x0};
+    ReadJsonFile(pf, &jsonStr[0], MAX_JSON_FILE_SIZE);
+
+    cJSON *root = NULL;
+    root = cJSON_Parse(jsonStr);
+    if (root == NULL) {
+        fprintf(stderr, "Error before: [%s]\n", cJSON_GetErrorPtr());
+        return NULL;
+    }
+
+    /* 插入ascend runtime */
+    cJSON *runtimes = NULL;
+    runtimes = cJSON_GetObjectItem(root, "runtimes");
+    if (runtimes == NULL) {
+        runtimes = CreateRuntimes();
+        if (runtimes == NULL) {
+            cJSON_Delete(root);
+            return NULL;
+        }
+        cJSON_AddItemToObject(root, RUNTIME_KEY, runtimes);      
+    } else {
+        int ret = DelJsonContent(runtimes, ASCEND_RUNTIME_NAME);
+        if (ret != 0) {
+            cJSON_Delete(root);
+            return NULL;    
+        }
+        cJSON  *ascendRuntime = NULL;
+        ascendRuntime = CreateAscendRuntimeInfo();
+        if (ascendRuntime == NULL) {
+            cJSON_Delete(root);
+            return NULL;
+        }
+        cJSON_AddItemToObject(runtimes, ASCEND_RUNTIME_NAME, ascendRuntime);    
+    }
+
+    /* 插入defaul runtime */
+    int ret = DelJsonContent(root, DEFALUT_KEY);
+    if (ret != 0) {
+        cJSON_Delete(root);
+        return NULL;    
+    }
+    cJSON *defaultRuntime = cJSON_CreateString(DEFAULT_VALUE);
+    if (defaultRuntime == NULL) {
+        cJSON_Delete(root);
+        return NULL;
+    }
+    cJSON_AddItemToObject(root, DEFALUT_KEY, defaultRuntime);
+    
     return root;
 }
 
-cJSON *InsertContent(const FILE *pf)
+cJSON *RemoveContent(const FILE *pf)
 {
     char jsonStr[MAX_JSON_FILE_SIZE] = {0x0};
     ReadJsonFile(pf, &jsonStr[0], MAX_JSON_FILE_SIZE);
+
     cJSON *root = NULL;
     root = cJSON_Parse(jsonStr);
-    if (!root) {
+    if (root == NULL) {
         fprintf(stderr, "Error before: [%s]\n", cJSON_GetErrorPtr());
         return NULL;
     }
-    
-    cJSON *runtimes = NULL;
-    runtimes = cJSON_GetObjectItem(root, "runtimes");
-    int ret;
-    if (runtimes == NULL) {
-        ret = CreateRuntimes(root);
-    } else {
-        ret = CreateNode(runtimes);
-    }
+
+    /* 去除default runtimes */
+    int ret = DelJsonContent(root, DEFALUT_KEY);
     if (ret != 0) {
+        cJSON_Delete(root);
         return NULL;
     }
+
+    /* 去除runtimes */
+    cJSON *runtimes = NULL;
+    runtimes = cJSON_GetObjectItem(root, RUNTIME_KEY);
+    if (runtimes == NULL) {
+        fprintf(stderr, "no runtime key found\n");
+        cJSON_Delete(root);
+        return NULL;
+    }
+
+    ret = DelJsonContent(runtimes, DEFAULT_VALUE);
+    if (ret != 0) {
+        cJSON_Delete(root);
+        return NULL;
+    }
+       
     return root;
 }
 
@@ -117,7 +243,7 @@ int DetectAndCreateJsonFile(const char *filePath, const char *tempPath)
     if (pf == NULL) {
         root = CreateContent();
     } else {
-        root = InsertContent(pf);
+        root = ModifyContent(pf);
         fclose(pf);
     }
 
@@ -140,46 +266,6 @@ int DetectAndCreateJsonFile(const char *filePath, const char *tempPath)
     return 0;
 }
 
-cJSON *GetNewContent(const FILE *pf)
-{
-    char jsonStr[MAX_JSON_FILE_SIZE] = {0x0};
-    ReadJsonFile(pf, &jsonStr[0], MAX_JSON_FILE_SIZE);
-
-    cJSON *root = NULL;
-    root = cJSON_Parse(jsonStr);
-    if (!root) {
-        fprintf(stderr, "Error before: [%s]\n", cJSON_GetErrorPtr());
-        return NULL;
-    }
-    
-    cJSON *runtimes = NULL;
-    runtimes = cJSON_GetObjectItem(root, "runtimes");
-    if (runtimes == NULL) {
-        fprintf(stderr, "no runtime key found\n");
-        cJSON_Delete(root);
-        return NULL;
-    }
-
-    cJSON *ascend = NULL;
-    ascend = cJSON_GetObjectItem(runtimes, "ascend");
-    if (ascend == NULL) {
-        fprintf(stderr, "no ascend key found\n");
-        cJSON_Delete(root);
-        return NULL;
-    }
-    
-    cJSON *removedItem = NULL;
-    removedItem = cJSON_DetachItemViaPointer(runtimes, ascend);
-    if (removedItem == NULL) {
-        fprintf(stderr, "remove runtime failed\n");
-        cJSON_Delete(root);
-        return NULL;
-    }
-    
-    cJSON_Delete(removedItem);
-    return root;
-}
-
 int CreateRevisedJsonFile(const char *filePath, const char *tempPath)
 {
     FILE *pf = NULL; 
@@ -189,7 +275,7 @@ int CreateRevisedJsonFile(const char *filePath, const char *tempPath)
         return -1;
     }
     cJSON *newContent = NULL;
-    newContent = GetNewContent(pf);
+    newContent = RemoveContent(pf);
     fclose(pf);
 
     if (newContent == NULL) {
@@ -224,6 +310,5 @@ int main(int argc, char *argv[])
     if (strcmp(argv[CMD_INDEX], ADD_CMD) == 0) {
         return DetectAndCreateJsonFile(argv[FINAL_FILE_INDEX], argv[TEMP_FILE_INDEX]);
     }
-    return CreateRevisedJsonFile(argv[FINAL_FILE_INDEX], argv[TEMP_FILE_INDEX]);
-    
-}
\ No newline at end of file
+    return CreateRevisedJsonFile(argv[FINAL_FILE_INDEX], argv[TEMP_FILE_INDEX]);   
+}