diff --git a/weex_core/Source/android/bridge/script_bridge_in_multi_process.cpp b/weex_core/Source/android/bridge/script_bridge_in_multi_process.cpp
index 29deee1527..8c2711c2c6 100644
--- a/weex_core/Source/android/bridge/script_bridge_in_multi_process.cpp
+++ b/weex_core/Source/android/bridge/script_bridge_in_multi_process.cpp
@@ -267,14 +267,17 @@ static std::unique_ptr<IPCResult> HandleCallGCanvasLinkNative(
 //    retVal = WeexCoreManager::Instance()->script_bridge()->core_side()->CallGCanvasLinkNative(pageId, type,
 //                                                                                     args);
 
-      std::unique_ptr<IPCResult> ret = createVoidResult();
-      if (retVal) {
-    jstring jDataStr = env->NewStringUTF(retVal);
-    ret = std::unique_ptr<IPCResult>(
-        new IPCStringResult(jstring2WeexString(env, jDataStr)));
-    env->DeleteLocalRef(jDataStr);
-    retVal = NULL;
+  std::unique_ptr<IPCResult> ret = createVoidResult();
+  if (retVal) {
+      jstring jDataStr = env->NewStringUTF(retVal);
+      ret = std::unique_ptr<IPCResult>(
+              new IPCStringResult(jstring2WeexString(env, jDataStr)));
+      env->DeleteLocalRef(jDataStr);
+      if (strlen(retVal) > 0) {
+        delete retVal;
       }
+    retVal = NULL;
+  }
 //      env->DeleteLocalRef(jPageId);
 //      env->DeleteLocalRef(val);
       return ret;
diff --git a/weex_core/Source/android/jsengine/object/weex_global_object.cpp b/weex_core/Source/android/jsengine/object/weex_global_object.cpp
index 33952b05d8..0d87c04ee6 100644
--- a/weex_core/Source/android/jsengine/object/weex_global_object.cpp
+++ b/weex_core/Source/android/jsengine/object/weex_global_object.cpp
@@ -369,9 +369,14 @@ JSFUNCTION functionGCanvasLinkNative(ExecState *state) {
     JSValue arg_js = state->argument(2);
     String arg_str = arg_js.toWTFString(state);
 
-    auto result = globalObject->js_bridge()->core_side()->CallGCanvasLinkNative(id_str.utf8().data(),
+    const char * resultChar = globalObject->js_bridge()->core_side()->CallGCanvasLinkNative(id_str.utf8().data(),
                                                                                 type, arg_str.utf8().data());
-    return JSValue::encode(String2JSValue(state, result));
+    auto result = resultChar;
+    auto ret = JSValue::encode(String2JSValue(state, result));
+    if (strlen(resultChar) > 0) {
+        delete resultChar;
+    }
+    return ret;
 }
 
 JSFUNCTION functionT3DLinkNative(ExecState *state) {