diff --git a/internal/controller/answer_controller.go b/internal/controller/answer_controller.go
index 8e4ca92d..58fd56c4 100644
--- a/internal/controller/answer_controller.go
+++ b/internal/controller/answer_controller.go
@@ -110,6 +110,7 @@ func (ac *AnswerController) Add(ctx *gin.Context) {
 	if handler.BindAndCheck(ctx, req) {
 		return
 	}
+	req.QuestionID = uid.DeShortID(req.QuestionID)
 	req.UserID = middleware.GetLoginUserIDFromContext(ctx)
 
 	can, err := ac.rankService.CheckOperationPermission(ctx, req.UserID, permission.AnswerAdd, "")