diff --git a/src/sql/das/ob_das_factory.cpp b/src/sql/das/ob_das_factory.cpp
index 8285a7823d..e6b539e8a9 100644
--- a/src/sql/das/ob_das_factory.cpp
+++ b/src/sql/das/ob_das_factory.cpp
@@ -278,15 +278,18 @@ int ObDASTaskFactory::create_das_extra_data(ObDASExtraData *&extra_result)
 }
 
 int ObDASTaskFactory::create_das_async_cb(
-    const common::ObSEArray<ObIDASTaskOp *, 2> &task_ops, const ObMemAttr &attr,
-    ObDASRef &das_ref, ObRpcDasAsyncAccessCallBack *&async_cb) {
+    const common::ObSEArray<ObIDASTaskOp *, 2> &task_ops,
+    const ObMemAttr &attr,
+    ObDASRef &das_ref,
+    ObRpcDasAsyncAccessCallBack *&async_cb,
+    int64_t timeout_ts) {
   int ret = OB_SUCCESS;
   void *buffer = nullptr;
   ObDasAsyncRpcCallBackContext *context = nullptr;
   if (OB_ISNULL(buffer = allocator_.alloc(sizeof(ObDasAsyncRpcCallBackContext)))) {
     ret = OB_ALLOCATE_MEMORY_FAILED;
     LOG_WARN("failed to allocate das async cb context memory", K(ret), K(sizeof(ObDasAsyncRpcCallBackContext)));
-  } else if (FALSE_IT(context = new (buffer) ObDasAsyncRpcCallBackContext(das_ref, task_ops))) {
+  } else if (FALSE_IT(context = new (buffer) ObDasAsyncRpcCallBackContext(das_ref, task_ops, timeout_ts))) {
   } else if (OB_FAIL(context->init(attr))) {
     LOG_WARN("fail to init das async cb context", K(ret));
   } else if (OB_ISNULL(buffer = allocator_.alloc(sizeof(ObRpcDasAsyncAccessCallBack)))) {
diff --git a/src/sql/das/ob_das_factory.h b/src/sql/das/ob_das_factory.h
index 5dfbd350fd..0aa5fba237 100644
--- a/src/sql/das/ob_das_factory.h
+++ b/src/sql/das/ob_das_factory.h
@@ -39,8 +39,10 @@ public:
   int create_das_ctdef(ObDASOpType op_type, ObDASBaseCtDef *&ctdef);
   int create_das_rtdef(ObDASOpType op_type, ObDASBaseRtDef *&rtdef);
   int create_das_async_cb(const common::ObSEArray<ObIDASTaskOp *, 2> &task_ops,
-      const ObMemAttr &attr, ObDASRef &das_ref,
-      ObRpcDasAsyncAccessCallBack *&async_cb);
+                          const ObMemAttr &attr,
+                          ObDASRef &das_ref,
+                          ObRpcDasAsyncAccessCallBack *&async_cb,
+                          int64_t timeout_ts);
   static int create_das_ctdef(ObDASOpType op_type, common::ObIAllocator &alloc, ObDASBaseCtDef *&ctdef);
   static int create_das_rtdef(ObDASOpType op_type, common::ObIAllocator &alloc, ObDASBaseRtDef *&rtdef);
   template <typename CtDef>
diff --git a/src/sql/das/ob_das_ref.cpp b/src/sql/das/ob_das_ref.cpp
index 01bf4ab2eb..0151def90e 100644
--- a/src/sql/das/ob_das_ref.cpp
+++ b/src/sql/das/ob_das_ref.cpp
@@ -376,12 +376,14 @@ int ObDASRef::wait_all_tasks()
   return OB_UNIMPLEMENTED_FEATURE;
 }
 
-int ObDASRef::allocate_async_das_cb(ObRpcDasAsyncAccessCallBack *&async_cb, const common::ObSEArray<ObIDASTaskOp*, 2> &task_ops)
+int ObDASRef::allocate_async_das_cb(ObRpcDasAsyncAccessCallBack *&async_cb,
+                                    const common::ObSEArray<ObIDASTaskOp*, 2> &task_ops,
+                                    int64_t timeout_ts)
 {
   int ret = OB_SUCCESS;
   OB_ASSERT(async_cb == nullptr);
   ObDASTaskFactory &das_factory = get_das_factory();
-  if (OB_FAIL(das_factory.create_das_async_cb(task_ops, das_alloc_.get_attr(), *this, async_cb))) {
+  if (OB_FAIL(das_factory.create_das_async_cb(task_ops, das_alloc_.get_attr(), *this, async_cb, timeout_ts))) {
     LOG_WARN("failed to create das async cb", K(ret));
   } else if (OB_ISNULL(async_cb)) {
     ret = OB_ERR_UNEXPECTED;
diff --git a/src/sql/das/ob_das_ref.h b/src/sql/das/ob_das_ref.h
index 360fdd342a..17ae1e2981 100644
--- a/src/sql/das/ob_das_ref.h
+++ b/src/sql/das/ob_das_ref.h
@@ -143,7 +143,9 @@ public:
   int acquire_task_execution_resource();
   int get_aggregated_tasks_count() const { return aggregated_tasks_.get_size(); }
   int wait_all_tasks();
-  int allocate_async_das_cb(ObRpcDasAsyncAccessCallBack *&async_cb, const common::ObSEArray<ObIDASTaskOp*, 2> &task_ops);
+  int allocate_async_das_cb(ObRpcDasAsyncAccessCallBack *&async_cb,
+                            const common::ObSEArray<ObIDASTaskOp*, 2> &task_ops,
+                            int64_t timeout_ts);
   void remove_async_das_cb(ObRpcDasAsyncAccessCallBack *das_async_cb);
 private:
   DISABLE_COPY_ASSIGN(ObDASRef);
diff --git a/src/sql/das/ob_das_rpc_processor.cpp b/src/sql/das/ob_das_rpc_processor.cpp
index a9b2aee2b0..fa3ef072a9 100644
--- a/src/sql/das/ob_das_rpc_processor.cpp
+++ b/src/sql/das/ob_das_rpc_processor.cpp
@@ -209,9 +209,17 @@ int ObDASAsyncAccessP::process()
 
 void ObRpcDasAsyncAccessCallBack::on_timeout()
 {
-  int ret = OB_SUCCESS;
-  LOG_WARN("das async task timeout", K(get_task_ops()));
-  result_.set_err_code(OB_TIMEOUT);
+  int ret = OB_TIMEOUT;
+  int64_t current_ts = ObTimeUtility::current_time();
+  int64_t timeout_ts = context_->get_timeout_ts();
+  // ESTIMATE_PS_RESERVE_TIME = 100 * 1000
+  if (timeout_ts - current_ts > 100 * 1000) {
+    LOG_DEBUG("rpc return OB_TIMEOUT before actual timeout, change error code to OB_RPC_CONNECT_ERROR", KR(ret),
+              K(timeout_ts), K(current_ts));
+    ret = OB_RPC_CONNECT_ERROR;
+  }
+  LOG_WARN("das async task timeout", KR(ret), K(get_task_ops()));
+  result_.set_err_code(ret);
   result_.get_op_results().reuse();
   context_->get_das_ref().inc_concurrency_limit_with_signal();
 }
diff --git a/src/sql/das/ob_das_rpc_processor.h b/src/sql/das/ob_das_rpc_processor.h
index 1f0a25b47d..36b2da4bf7 100644
--- a/src/sql/das/ob_das_rpc_processor.h
+++ b/src/sql/das/ob_das_rpc_processor.h
@@ -85,17 +85,21 @@ class ObDASAsyncAccessP final : public ObDASBaseAccessP<obrpc::OB_DAS_ASYNC_ACCE
 class ObDasAsyncRpcCallBackContext
 {
 public:
-  ObDasAsyncRpcCallBackContext(ObDASRef &das_ref, const common::ObSEArray<ObIDASTaskOp*, 2> &task_ops)
-      : das_ref_(das_ref), task_ops_(task_ops), alloc_() {}
+  ObDasAsyncRpcCallBackContext(ObDASRef &das_ref,
+                               const common::ObSEArray<ObIDASTaskOp*, 2> &task_ops,
+                               int64_t timeout_ts)
+      : das_ref_(das_ref), task_ops_(task_ops), alloc_(), timeout_ts_(timeout_ts) {}
   ~ObDasAsyncRpcCallBackContext() = default;
   int init(const ObMemAttr &attr);
   ObDASRef &get_das_ref() { return das_ref_; };
   const common::ObSEArray<ObIDASTaskOp*, 2> &get_task_ops() const { return task_ops_; };
   common::ObArenaAllocator &get_alloc() { return alloc_; };
+  int64_t get_timeout_ts() const { return timeout_ts_; }
 private:
   ObDASRef &das_ref_;
   const common::ObSEArray<ObIDASTaskOp*, 2> task_ops_;
   common::ObArenaAllocator alloc_;  // used for async rpc result allocation.
+  int64_t timeout_ts_;
 };
 
 class ObRpcDasAsyncAccessCallBack
diff --git a/src/sql/das/ob_data_access_service.cpp b/src/sql/das/ob_data_access_service.cpp
index fa17c65849..e10ae97732 100644
--- a/src/sql/das/ob_data_access_service.cpp
+++ b/src/sql/das/ob_data_access_service.cpp
@@ -378,14 +378,16 @@ int ObDataAccessService::do_async_remote_das_task(
   FLTSpanGuard(do_async_remote_das_task);
   ObSQLSessionInfo *session = das_ref.get_exec_ctx().get_my_session();
   ObPhysicalPlanCtx *plan_ctx = das_ref.get_exec_ctx().get_physical_plan_ctx();
-  int64_t timeout = plan_ctx->get_timeout_timestamp() - ObTimeUtility::current_time();
-#ifdef ERRSIM
-  int inject_timeout = -OB_E(EventTable::EN_DAS_SIMULATE_ASYNC_RPC_TIMEOUT) OB_SUCCESS;
-  if (OB_SUCCESS != inject_timeout) {
-    LOG_INFO("das async rpc simulate timeout", K(inject_timeout));
-    timeout = inject_timeout - 10;
+  int64_t timeout_ts = plan_ctx->get_timeout_timestamp();
+  int64_t current_ts = ObTimeUtility::current_time();
+  int64_t timeout = timeout_ts - current_ts;
+  int64_t simulate_timeout = - EVENT_CALL(EventTable::EN_DAS_SIMULATE_ASYNC_RPC_TIMEOUT);
+  if (OB_UNLIKELY(simulate_timeout > 0)) {
+    LOG_INFO("das async rpc simulate timeout", K(simulate_timeout),
+             K(timeout), K(timeout_ts), K(current_ts));
+    timeout = simulate_timeout;
+    timeout_ts = current_ts + timeout;
   }
-#endif
   uint64_t tenant_id = session->get_rpc_tenant_id();
   ObIDASTaskOp *task_op = task_arg.get_task_op();
   common::ObSEArray<ObIDASTaskOp*, 2> &task_ops = task_arg.get_task_ops();
@@ -399,7 +401,7 @@ int ObDataAccessService::do_async_remote_das_task(
   ObDASRemoteInfo::get_remote_info() = &remote_info;
   ObIDASTaskResult *op_result = nullptr;
   ObRpcDasAsyncAccessCallBack *das_async_cb = nullptr;
-  if (OB_FAIL(das_ref.allocate_async_das_cb(das_async_cb, task_ops))) {
+  if (OB_FAIL(das_ref.allocate_async_das_cb(das_async_cb, task_ops, timeout_ts))) {
     LOG_WARN("failed to allocate das async cb", K(ret));
   }
   // prepare op result in advance avoiding racing condition.