diff --git a/FreeSql.Tests/FreeSql.Tests/PostgreSQL/PostgreSQLExpression/StringTest.cs b/FreeSql.Tests/FreeSql.Tests/PostgreSQL/PostgreSQLExpression/StringTest.cs
index 341d8aa7..987f1a50 100644
--- a/FreeSql.Tests/FreeSql.Tests/PostgreSQL/PostgreSQLExpression/StringTest.cs
+++ b/FreeSql.Tests/FreeSql.Tests/PostgreSQL/PostgreSQLExpression/StringTest.cs
@@ -72,6 +72,9 @@ namespace FreeSql.Tests.PostgreSQLExpression
             val1 = string.Join("**", fsql.Select<StringJoin01>().ToList(a => a.id));
             val2 = fsql.Select<StringJoin01>().ToList(a => string.Join("**", fsql.Select<StringJoin01>().As("b").ToList(b => b.id)));
             Assert.Equal(val1, val2[0]);
+
+            fsql.GlobalFilter.Apply<StringJoin01>("test001", a => a.name.Length > 0);
+            val2 = fsql.Select<StringJoin01>().ToList(a => string.Join("**", fsql.Select<StringJoin01>().As("b").ToList(b => b.id)));
         }
         class StringJoin01
         {
diff --git a/FreeSql/Internal/CommonExpression.cs b/FreeSql/Internal/CommonExpression.cs
index 48dec526..ae1ffa9c 100644
--- a/FreeSql/Internal/CommonExpression.cs
+++ b/FreeSql/Internal/CommonExpression.cs
@@ -1030,7 +1030,7 @@ namespace FreeSql.Internal
                                         {
                                             var fsqlGlobalFilter = fsqlSelect0._whereGlobalFilter;
                                             if (fsqlGlobalFilter != tsc.whereGlobalFilter)
-                                                fsqlGlobalFilter.AddRange(tsc.whereGlobalFilter);
+                                                fsqlGlobalFilter.AddRange(tsc.whereGlobalFilter.Where(b => !fsqlGlobalFilter.Any(a => a.Name == b.Name)));
                                         }
                                     }
                                     else if (fsqlType != null)