diff --git a/Src/Asp.Net/SqlSugar/Realization/PostgreSQL/SqlBuilder/PostgreSQLExpressionContext.cs b/Src/Asp.Net/SqlSugar/Realization/PostgreSQL/SqlBuilder/PostgreSQLExpressionContext.cs
index 7c8476ecd..3c837be98 100644
--- a/Src/Asp.Net/SqlSugar/Realization/PostgreSQL/SqlBuilder/PostgreSQLExpressionContext.cs
+++ b/Src/Asp.Net/SqlSugar/Realization/PostgreSQL/SqlBuilder/PostgreSQLExpressionContext.cs
@@ -367,7 +367,8 @@ namespace SqlSugar
         }
         public override string MergeString(params string[] strings)
         {
-            return " concat("+string.Join(",", strings).Replace("+", "") + ") ";
+            var key = Guid.NewGuid() + "";
+            return " concat("+string.Join(",", strings.Select(it=>it?.Replace("+", key))).Replace("+", "").Replace(key, "+") + ") ";
         }
         public override string IsNull(MethodCallExpressionModel model)
         {