diff --git a/services/tel_ril/include/tel_ril_base.h b/services/tel_ril/include/tel_ril_base.h
index 2501574d8..2c565bf37 100644
--- a/services/tel_ril/include/tel_ril_base.h
+++ b/services/tel_ril/include/tel_ril_base.h
@@ -57,6 +57,7 @@ public:
 
     static std::shared_ptr<TelRilRequest> CreateTelRilRequest(const AppExecFwk::InnerEvent::Pointer &result);
     void ResetRilInterface(sptr<HDI::Ril::V1_3::IRil> rilInterface);
+    sptr<HDI::Ril::V1_3::IRil> GetRilInterface();
     static std::shared_ptr<TelRilRequest> FindTelRilRequest(const RadioResponseInfo &responseInfo);
     int32_t ErrorResponse(std::shared_ptr<TelRilRequest> telRilRequest, const RadioResponseInfo &responseInfo);
 
@@ -114,7 +115,8 @@ template<typename FuncType, typename... ParamTypes>
 inline int32_t TelRilBase::Request(const char *funcName, const AppExecFwk::InnerEvent::Pointer &response,
     FuncType &&_func, ParamTypes &&... _args)
 {
-    if (rilInterface_ == nullptr) {
+    sptr<HDI::Ril::V1_3::IRil> rilInterface = GetRilInterface();
+    if (rilInterface == nullptr) {
         TELEPHONY_LOGE("%{public}s() rilInterface_ is null", funcName);
         return TELEPHONY_ERR_LOCAL_PTR_NULL;
     }
@@ -123,7 +125,7 @@ inline int32_t TelRilBase::Request(const char *funcName, const AppExecFwk::Inner
         TELEPHONY_LOGE("%{public}s() telRilRequest is null", funcName);
         return TELEPHONY_ERR_LOCAL_PTR_NULL;
     }
-    return (rilInterface_->*(_func))(slotId_, telRilRequest->serialId_, std::forward<ParamTypes>(_args)...);
+    return (rilInterface->*(_func))(slotId_, telRilRequest->serialId_, std::forward<ParamTypes>(_args)...);
 }
 
 inline int32_t TelRilBase::Response(const char *funcName, const HDI::Ril::V1_1::RilRadioResponseInfo &iResponseInfo)
diff --git a/services/tel_ril/src/tel_ril_base.cpp b/services/tel_ril/src/tel_ril_base.cpp
index ee6af1ea7..4e45a0396 100644
--- a/services/tel_ril/src/tel_ril_base.cpp
+++ b/services/tel_ril/src/tel_ril_base.cpp
@@ -22,6 +22,7 @@ namespace Telephony {
 std::atomic_int TelRilBase::nextSerialId_(1);
 std::unordered_map<int32_t, std::shared_ptr<TelRilRequest>> TelRilBase::requestMap_;
 std::mutex TelRilBase::requestLock_;
+std::mutex dealLock_;
 std::shared_ptr<TelRilHandler> TelRilBase::handler_;
 
 TelRilBase::TelRilBase(int32_t slotId, sptr<HDI::Ril::V1_3::IRil> rilInterface,
@@ -33,9 +34,16 @@ TelRilBase::TelRilBase(int32_t slotId, sptr<HDI::Ril::V1_3::IRil> rilInterface,
 
 void TelRilBase::ResetRilInterface(sptr<HDI::Ril::V1_3::IRil> rilInterface)
 {
+    std::lock_guard<std::mutex> lock(dealLock_);
     rilInterface_ = rilInterface;
 }
 
+sptr<HDI::Ril::V1_3::IRil> TelRilBase::GetRilInterface()
+{
+    std::lock_guard<std::mutex> lock(dealLock_);
+    return rilInterface_;
+}
+
 std::shared_ptr<TelRilRequest> TelRilBase::CreateTelRilRequest(const AppExecFwk::InnerEvent::Pointer &result)
 {
     std::shared_ptr<TelRilRequest> telRilRequest = std::make_shared<TelRilRequest>(GetNextSerialId(), result);
@@ -83,7 +91,7 @@ std::shared_ptr<TelRilRequest> TelRilBase::FindTelRilRequest(const RadioResponse
 
 int32_t TelRilBase::GetSerialId(const AppExecFwk::InnerEvent::Pointer &response)
 {
-    if (rilInterface_ == nullptr) {
+    if (GetRilInterface() == nullptr) {
         TELEPHONY_LOGE("ERROR : rilInterface_ == nullptr !!!");
         return -TELEPHONY_ERR_ARGUMENT_INVALID;
     }