diff --git a/src/Luban.DataLoader.Builtin/DataVisitors/ExcelStreamDataCreator.cs b/src/Luban.DataLoader.Builtin/DataVisitors/ExcelStreamDataCreator.cs
index 76822980..6aeb92bf 100644
--- a/src/Luban.DataLoader.Builtin/DataVisitors/ExcelStreamDataCreator.cs
+++ b/src/Luban.DataLoader.Builtin/DataVisitors/ExcelStreamDataCreator.cs
@@ -262,14 +262,20 @@ public DType Accept(TBean type, ExcelStream x)
         {
             if (type.IsNullable)
             {
-                string subType = x.Read().ToString().Trim();
-                if (subType == FieldNames.BeanNullType)
+                if (x.TryPeed(out object subTypeObj)) //ToString().Trim();
                 {
-                    return null;
-                }
-                else if (subType != FieldNames.BeanNotNullType && subType != originBean.Name)
-                {
-                    throw new Exception($"type:'{originBean.FullName}' 可空标识:'{subType}' 不合法（只能为{FieldNames.BeanNotNullType}或{FieldNames.BeanNullType}或{originBean.Name})");
+                    string subType = subTypeObj.ToString().Trim();
+
+                    if (subType == FieldNames.BeanNullType)
+                    {
+                        x.Read();
+                        return null;
+                    }
+                    else if (subType == FieldNames.BeanNotNullType || subType == originBean.Name)
+                    {
+                        x.Read();
+                        //throw new Exception($"type:'{originBean.FullName}' 可空标识:'{subType}' 不合法（只能为{FieldNames.BeanNotNullType}或{FieldNames.BeanNullType}或{originBean.Name})");
+                    }
                 }
             }
             return new DBean(type, originBean, CreateBeanFields(originBean, x));
diff --git a/src/Luban.DataLoader.Builtin/Excel/ExcelStream.cs b/src/Luban.DataLoader.Builtin/Excel/ExcelStream.cs
index 48f4d92e..d2a9f399 100644
--- a/src/Luban.DataLoader.Builtin/Excel/ExcelStream.cs
+++ b/src/Luban.DataLoader.Builtin/Excel/ExcelStream.cs
@@ -190,6 +190,17 @@ public bool TryRead(out object data)
         return false;
     }
 
+    public bool TryPeed(out object data)
+    {
+        int oldCurIndex = _curIndex;
+        if (TryRead(out data))
+        {
+            _curIndex = oldCurIndex;
+            return true;
+        }
+        return false;
+    }
+
     public object Read(bool notSkip = false)
     {
         //if (curIndex <= toIndex)