diff --git a/routers/repo/modelarts.go b/routers/repo/modelarts.go
index e2174919e..ecabfd8d8 100755
--- a/routers/repo/modelarts.go
+++ b/routers/repo/modelarts.go
@@ -12,6 +12,7 @@ import (
 	"strconv"
 	"strings"
 	"time"
+	"unicode/utf8"
 
 	"code.gitea.io/gitea/models"
 	"code.gitea.io/gitea/modules/auth"
@@ -1291,7 +1292,7 @@ func paramCheckCreateInferenceJob(form auth.CreateModelArtsInferenceJobForm) err
 		return errors.New("分支名不能为空")
 	}
 
-	if len(form.Description) > 255 {
+	if utf8.RuneCountInString(form.Description) > 255 {
 		log.Error("the Description length(%d) must not more than 255", form.Description)
 		return errors.New("描述字符不能超过255个字符")
 	}