diff --git a/encoding/form/form_test.go b/encoding/form/form_test.go
index f437ddf1a..384869c52 100644
--- a/encoding/form/form_test.go
+++ b/encoding/form/form_test.go
@@ -1,6 +1,7 @@
 package form
 
 import (
+	"encoding/base64"
 	"reflect"
 	"testing"
 
@@ -178,3 +179,16 @@ func TestDecodeStructPb(t *testing.T) {
 		t.Errorf("except %v, got %v", "go-kratos", req.Data.GetFields()["name2"].GetStringValue())
 	}
 }
+
+func TestDecodeBytesValuePb(t *testing.T) {
+	url := "https://example.com/xx/?a=1&b=2&c=3"
+	val := base64.URLEncoding.EncodeToString([]byte(url))
+	content := "bytes=" + val
+	in2 := &complex.Complex{}
+	if err := encoding.GetCodec(contentType).Unmarshal([]byte(content), in2); err != nil {
+		t.Errorf("expect %v, got %v", nil, err)
+	}
+	if !reflect.DeepEqual(url, string(in2.Bytes.Value)) {
+		t.Errorf("except %v, got %v", val, string(in2.Bytes.Value))
+	}
+}
diff --git a/encoding/form/proto_decode.go b/encoding/form/proto_decode.go
index 8b4b31590..9e31e3ba7 100644
--- a/encoding/form/proto_decode.go
+++ b/encoding/form/proto_decode.go
@@ -283,7 +283,9 @@ func parseMessage(md protoreflect.MessageDescriptor, value string) (protoreflect
 	case "google.protobuf.BytesValue":
 		v, err := base64.StdEncoding.DecodeString(value)
 		if err != nil {
-			return protoreflect.Value{}, err
+			if v, err = base64.URLEncoding.DecodeString(value); err != nil {
+				return protoreflect.Value{}, err
+			}
 		}
 		msg = wrapperspb.Bytes(v)
 	case "google.protobuf.FieldMask":