diff --git a/Examples/base_entity/Program.cs b/Examples/base_entity/Program.cs
index ae01c447..bcb43906 100644
--- a/Examples/base_entity/Program.cs
+++ b/Examples/base_entity/Program.cs
@@ -487,6 +487,11 @@ namespace base_entity
             BaseEntity.Initialization(fsql, () => _asyncUow.Value);
             #endregion
 
+            using (var uow = fsql.CreateUnitOfWork())
+            {
+                uow.Orm.Select<User1>().ForUpdate().ToList();
+            }
+
             var listaaaddd = new List<User1>();
             for (int i = 0; i < 2; i++)
             {
diff --git a/FreeSql.DbContext/DbContext/DbContextScopedFreeSql.cs b/FreeSql.DbContext/DbContext/DbContextScopedFreeSql.cs
index 068d53d1..bad76689 100644
--- a/FreeSql.DbContext/DbContext/DbContextScopedFreeSql.cs
+++ b/FreeSql.DbContext/DbContext/DbContextScopedFreeSql.cs
@@ -70,7 +70,10 @@ namespace FreeSql
         {
             var db = _resolveDbContext?.Invoke();
             db?.FlushCommand();
-            var select = _originalFsql.Select<T1>().WithTransaction(_resolveUnitOfWork?.Invoke()?.GetOrBeginTransaction(false));
+            var uow = _resolveUnitOfWork?.Invoke();
+            var uowIsolationLevel = uow?.IsolationLevel ?? IsolationLevel.Unspecified;
+            var select = _originalFsql.Select<T1>().WithTransaction(uow?.GetOrBeginTransaction(uowIsolationLevel != IsolationLevel.Unspecified));
+            (select as Select0Provider)._resolveHookTransaction = () => uow?.GetOrBeginTransaction();
             if (db?.Options.EnableGlobalFilter == false) select.DisableGlobalFilter();
             return select;
         }
diff --git a/FreeSql.DbContext/DbSet/DbSet.cs b/FreeSql.DbContext/DbSet/DbSet.cs
index 59f5a5cc..e3613bed 100644
--- a/FreeSql.DbContext/DbSet/DbSet.cs
+++ b/FreeSql.DbContext/DbSet/DbSet.cs
@@ -9,6 +9,7 @@ using System.Linq.Expressions;
 using System.Reflection;
 using System.Threading;
 using FreeSql.Internal.CommonProvider;
+using System.Data;
 
 namespace FreeSql
 {
@@ -34,7 +35,9 @@ namespace FreeSql
         protected virtual ISelect<TEntity> OrmSelect(object dywhere)
         {
             DbContextFlushCommand(); //查询前先提交，否则会出脏读
-            var select = _db.OrmOriginal.Select<TEntity>().AsType(_entityType).WithTransaction(_uow?.GetOrBeginTransaction(false)).TrackToList(TrackToList).WhereDynamic(dywhere);
+            var uowIsolationLevel = _uow?.IsolationLevel ?? IsolationLevel.Unspecified;
+            var select = _db.OrmOriginal.Select<TEntity>().AsType(_entityType).WithTransaction(_uow?.GetOrBeginTransaction(uowIsolationLevel != IsolationLevel.Unspecified)).TrackToList(TrackToList).WhereDynamic(dywhere);
+            (select as Select0Provider)._resolveHookTransaction = () => _uow?.GetOrBeginTransaction();
             if (_db.Options.EnableGlobalFilter == false) select.DisableGlobalFilter();
             return select;
         }
diff --git a/FreeSql/Internal/CommonProvider/SelectProvider/Select0Provider.cs b/FreeSql/Internal/CommonProvider/SelectProvider/Select0Provider.cs
index ecf4b817..f2ac8e0c 100644
--- a/FreeSql/Internal/CommonProvider/SelectProvider/Select0Provider.cs
+++ b/FreeSql/Internal/CommonProvider/SelectProvider/Select0Provider.cs
@@ -47,6 +47,7 @@ namespace FreeSql.Internal.CommonProvider
         public Func<bool> _cancel;
         public bool _is_AsTreeCte;
         public BaseDiyMemberExpression _diymemexpWithTempQuery;
+        public Func<DbTransaction> _resolveHookTransaction;
 
         public bool IsDefaultSqlContent => _distinct == false && _is_AsTreeCte == false && _tables.Count == 1 && _where.Length == 0 && _join.Length == 0 &&
             string.IsNullOrWhiteSpace(_orderby) && string.IsNullOrWhiteSpace(_groupby) && string.IsNullOrWhiteSpace(_tosqlAppendContent) &&
@@ -1187,8 +1188,9 @@ namespace FreeSql.Internal.CommonProvider
         }
         public TSelect ForUpdate(bool noawait = false)
         {
-            if (_transaction == null && _orm.Ado.TransactionCurrentThread == null)
-                throw new Exception($"{CoreStrings.Begin_Transaction_Then_ForUpdate}");
+            if (_transaction == null && _orm.Ado.TransactionCurrentThread != null) this.WithTransaction(_orm.Ado.TransactionCurrentThread);
+            if (_transaction == null && _resolveHookTransaction != null) this.WithTransaction(_resolveHookTransaction());
+            if (_transaction == null) throw new Exception($"{CoreStrings.Begin_Transaction_Then_ForUpdate}");
             switch (_orm.Ado.DataType)
             {
                 case DataType.MySql: