diff --git a/pkg/service/cast/tag.go b/pkg/service/cast/tag.go
index 836662e..1a8f625 100644
--- a/pkg/service/cast/tag.go
+++ b/pkg/service/cast/tag.go
@@ -289,6 +289,11 @@ func GenerateAutoHashtags(ctx context.Context, post string, max int32, position,
 		max = int32(5 - len(beforeTags))
 	}
 
+	// 如果此时 max 小于等于0，则直接返回
+	if max <= 0 {
+		return nil, nil, false, nil
+	}
+
 	profileKey, err := GetValidProfileKey(ctx, []uint32{1, 2, 3, 5})
 	if err != nil {
 		return nil, nil, false, err