diff --git a/services/state/include/dinput_state.h b/services/state/include/dinput_state.h
index 8931611..8dd9b49 100644
--- a/services/state/include/dinput_state.h
+++ b/services/state/include/dinput_state.h
@@ -55,7 +55,6 @@ private:
     void CheckKeyboardState(std::string &dhid, std::string &keyboardNodePath,
         std::vector<uint32_t> &keyboardPressedKeys, int &fd);
     void SpecEventInject(const int32_t &sessionId, std::vector<std::string> dhids);
-    bool IsDhidExist(const std::string &dhid);
     void RecordEventLog(const input_event &event);
     void WriteEventToDev(int &fd, const input_event &event);
     void CheckMouseKeyState(const int32_t &sessionId, const std::string &mouseNodePath,
diff --git a/services/state/src/dinput_state.cpp b/services/state/src/dinput_state.cpp
index 378b09e..6aa1282 100644
--- a/services/state/src/dinput_state.cpp
+++ b/services/state/src/dinput_state.cpp
@@ -58,11 +58,7 @@ int32_t DInputState::RecordDhids(const std::vector<std::string> &dhids, DhidStat
     std::unique_lock<std::mutex> mapLock(operationMutex_);
     for (auto &dhid : dhids) {
         DHLOGD("add dhid : %s, state : %d.", GetAnonyString(dhid).c_str(), state);
-        if (IsDhidExist(dhid)) {
-            DHLOGI("dhid : %s already exist.", GetAnonyString(dhid).c_str());
-        } else {
-            dhidStateMap_[dhid] = state;
-        }
+        dhidStateMap_[dhid] = state;
     }
 
     if (state == DhidState::THROUGH_OUT) {
@@ -77,32 +73,21 @@ int32_t DInputState::RemoveDhids(const std::vector<std::string> &dhids)
     std::unique_lock<std::mutex> mapLock(operationMutex_);
     for (auto &dhid : dhids) {
         DHLOGD("delete dhid : %s", GetAnonyString(dhid).c_str());
-        if (!IsDhidExist(dhid)) {
-            DHLOGE("dhid : %s not exist.", GetAnonyString(dhid).c_str());
-        } else {
-            dhidStateMap_.erase(dhid);
-        }
+        dhidStateMap_.erase(dhid);
     }
     return DH_SUCCESS;
 }
 
 DhidState DInputState::GetStateByDhid(std::string &dhid)
 {
-    if (!IsDhidExist(dhid)) {
+    std::unique_lock<std::mutex> mapLock(operationMutex_);
+    if (dhidStateMap_.find(dhid) == dhidStateMap_.end()) {
         DHLOGE("dhid : %s not exist.", GetAnonyString(dhid).c_str());
         return DhidState::THROUGH_IN;
     }
     return dhidStateMap_[dhid];
 }
 
-bool DInputState::IsDhidExist(const std::string &dhid)
-{
-    if (dhidStateMap_.find(dhid) == dhidStateMap_.end()) {
-        return false;
-    }
-    return true;
-}
-
 void DInputState::CreateSpecialEventInjectThread(const int32_t &sessionId, const std::vector<std::string> &dhids)
 {
     DHLOGI("CreateSpecialEventInjectThread enter, dhids.size = %d, sessionId = %d.", dhids.size(), sessionId);