diff --git a/UI/VarManages/ModbusModel.py b/UI/VarManages/ModbusModel.py
index e39fde3..0a9586f 100644
--- a/UI/VarManages/ModbusModel.py
+++ b/UI/VarManages/ModbusModel.py
@@ -401,20 +401,32 @@ class VarButtonDelegate(QItemDelegate):
         
         
             if sender.oldName and ModbusVarManage.getByName(sender.oldName, modbusType):
-                if sender.oldName == name or [varMes[3] for varMes in model.datas].count(name) < 2:
-                    ModbusVarManage.editVar(name = sender.oldName, Nname = name, des = des, 
-                                            varType = varType, slaveID = slaveID, address = address,
-                                            min = min, max = max, order = order, modbusType = modbusType, varModel= varModel)
+                if sender.oldName == name:
+                    # 名称未改变，直接执行修改变量操作
+                    ModbusVarManage.editVar(name=sender.oldName, Nname=name, des=des, 
+                                varType=varType, slaveID=slaveID, address=address,
+                                min=min, max=max, order=order, modbusType=modbusType, varModel=varModel)
                 else:
+                    # 名称改变，检查新名称是否已存在
+                    if GlobalVarManager.isVarNameExist(name):
+                        QMessageBox.information(self.parent(), '提示', '已有同名变量')
+                        return
+                    else:
+                        # 执行修改变量操作
+                        ModbusVarManage.editVar(name=sender.oldName, Nname=name, des=des, 
+                                                varType=varType, slaveID=slaveID, address=address,
+                                                min=min, max=max, order=order, modbusType=modbusType, varModel=varModel)
+                                
+            else:
+                if  GlobalVarManager.isVarNameExist(name):
                     QMessageBox.information(self.parent(), '提示', '已有同名变量')
                     return
-            else:
-                res = ModbusVarManage.createVar(varName = name, varType = varType, des = des, 
+                else:
+                    ModbusVarManage.createVar(varName = name, varType = varType, des = des, 
                                                 address = address, slaveID = slaveID, min = min, 
                                                 max = max, order = order, modbusType = modbusType, varModel= varModel)
-                if res:
-                    QMessageBox.information(self.parent(), '提示', '已有同名变量')
-                    return
+                   
+                   
             sender.setIcon(qtawesome.icon('fa.pencil', color='#4c8cf2'))
             rowIndex = sender.index[0]
             varMes = ModbusVarManage.getByName(name, modbusType)
diff --git a/model/ProjectModel/VarManage.py b/model/ProjectModel/VarManage.py
index 83efd30..d3ab85d 100644
--- a/model/ProjectModel/VarManage.py
+++ b/model/ProjectModel/VarManage.py
@@ -525,4 +525,37 @@ class HartSimulateVarManage(object):
             return False
 
     def initVar(self):
-            self.createVar(varName='name',  des='TC', varModel='本地值')
\ No newline at end of file
+            self.createVar(varName='name',  des='TC', varModel='本地值')
+
+class GlobalVarManager(object):
+    # 所有支持的变量模型类列表
+    allVarClass = [
+        ModbusTcpMasterVar, ModbusTcpSlaveVar, ModbusRtuMasterVar, ModbusRtuSlaveVar,
+        HartVar, TcRtdVar, AnalogVar, HartSimulateVar
+    ]
+
+    @classmethod
+    def getAllVarNames(cls):
+        """获取所有协议模型中存在的变量名（去重集合）"""
+        allVarNames = set()
+        
+        for varClass in cls.allVarClass:
+            try:
+                # 查询该模型类的所有变量名
+                query = varClass.select(varClass.varName)
+                names = {var.varName for var in query}
+                allVarNames.update(names)
+            except Exception as e:
+                print(f"查询 {varClass.__name__} 变量名失败: {str(e)}")
+        
+        return allVarNames
+
+    @classmethod
+    def isVarNameExist(cls, varName):
+        """检查新变量名是否在任意协议模型中已存在"""
+        existingNames = cls.getAllVarNames()
+        print(varName,existingNames )
+        if str(varName) in existingNames:
+            return True
+        else:
+            return False
\ No newline at end of file