diff --git a/UI/VarManages/TCRTDModel.py b/UI/VarManages/TCRTDModel.py
index e99864a..1548946 100644
--- a/UI/VarManages/TCRTDModel.py
+++ b/UI/VarManages/TCRTDModel.py
@@ -190,9 +190,13 @@ class TcRtdButtonDelegate(VarButtonDelegate):
                                              QMessageBox.Yes)
                 return    
         mv = temToMv(varType, float(value))
-        mv += float(compensation)
         if not mv and mv != 0:
+            reply = QMessageBox.question(self.parent(),
+                                             '警告',
+                                             "输入值有误",
+                                             QMessageBox.Yes)
             return
+        mv += float(compensation)
         model.table.mvList[sender.index[0]] = mv
         model.table.valueList[sender.index[0]] = float(value)
         forceVars = Globals.getValue('forceVars')