diff --git a/pkg/service/cast/analysis.go b/pkg/service/cast/analysis.go
index 51ddb21d..d7845495 100644
--- a/pkg/service/cast/analysis.go
+++ b/pkg/service/cast/analysis.go
@@ -259,11 +259,13 @@ func ImportWorkAnalysisBatch(ctx *gin.Context) {
 			artistName = subInfoResp.Name
 		}
 
-		// 将 submitTime（YYYY-MM-DD 00:00:00）加随机 9~15 小时，使提交时间落在 09:00~15:00 之间
+		// 将 submitTime（YYYY-MM-DD 00:00:00）加随机 9~15 小时、0~59 分钟、0~59 秒，使提交时间更真实
 		if submitTime != "" {
 			if parsedTime, parseErr := time.Parse("2006-01-02 15:04:05", submitTime); parseErr == nil {
-				randomHours := time.Duration(rand.Intn(7)+9) * time.Hour
-				submitTime = parsedTime.Add(randomHours).Format("2006-01-02 15:04:05")
+				randomDuration := time.Duration(rand.Intn(7)+9)*time.Hour +
+					time.Duration(rand.Intn(60))*time.Minute +
+					time.Duration(rand.Intn(60))*time.Second
+				submitTime = parsedTime.Add(randomDuration).Format("2006-01-02 15:04:05")
 			}
 		}