diff --git a/Api/Ewide.Core/Service/Area/AreaCodeService.cs b/Api/Ewide.Core/Service/Area/AreaCodeService.cs
index 22df093..01dfaad 100644
--- a/Api/Ewide.Core/Service/Area/AreaCodeService.cs
+++ b/Api/Ewide.Core/Service/Area/AreaCodeService.cs
@@ -32,6 +32,7 @@ namespace Ewide.Core.Service.Area
         public async Task AddAreaCode(AreaCodeInput input)
         {
             CheckInput(input);
+            CheckCode(input);
             CheckArea(input);
             await _areaCodeRep.InsertNowAsync(input.Adapt<SysAreaCode>());
             await _sysCacheService.SetAreaCode(await _areaCodeRep.DetachedEntities.ToListAsync());
@@ -138,5 +139,15 @@ namespace Ewide.Core.Service.Area
             }
             return true;
         }
+
+        private bool CheckCode(AreaCodeInput input)
+        {
+            var any = _areaCodeRep.DetachedEntities.Any(p =>  p.Code == input.Code);
+            if (any)
+            {
+                throw Oops.Oh("编码重复");
+            }
+            return true;
+        }
     }
 }