diff --git a/lego/utils/codec/factory/factory_struct.go b/lego/utils/codec/factory/factory_struct.go
index a475652e3..03efeb622 100644
--- a/lego/utils/codec/factory/factory_struct.go
+++ b/lego/utils/codec/factory/factory_struct.go
@@ -3,6 +3,8 @@ package factory
 import (
 	"errors"
 	"fmt"
+	"go_dreamfactory/lego/utils/codec/codecore"
+	"go_dreamfactory/lego/utils/codec/utils"
 	"io"
 	"reflect"
 	"sort"
@@ -10,8 +12,6 @@ import (
 	"unicode"
 	"unsafe"
 
-	"go_dreamfactory/lego/utils/codec/codecore"
-
 	"github.com/modern-go/reflect2"
 )
 
@@ -108,6 +108,9 @@ func describeStruct(ctx *codecore.Ctx, typ reflect2.Type) *StructDescriptor {
 	bindings := []*Binding{}
 	for i := 0; i < structType.NumField(); i++ {
 		field := structType.Field(i)
+		if !utils.IsExported(field.Name()) { //内部字段不处理
+			continue
+		}
 		tag, hastag := field.Tag().Lookup(ctx.Config.TagKey)
 		if ctx.Config.OnlyTaggedField && !hastag && !field.Anonymous() {
 			continue
diff --git a/lego/utils/codec/utils/utils.go b/lego/utils/codec/utils/utils.go
new file mode 100644
index 000000000..0ca85fb2e
--- /dev/null
+++ b/lego/utils/codec/utils/utils.go
@@ -0,0 +1,12 @@
+package utils
+
+import (
+	"unicode"
+	"unicode/utf8"
+)
+
+///是否是内部字段
+func IsExported(name string) bool {
+	rune, _ := utf8.DecodeRuneInString(name)
+	return unicode.IsUpper(rune)
+}