diff --git a/chat-server/src/main/java/com/bjtds/brichat/util/SheetHandler.java b/chat-server/src/main/java/com/bjtds/brichat/util/SheetHandler.java
index d9e68cd..f607c40 100644
--- a/chat-server/src/main/java/com/bjtds/brichat/util/SheetHandler.java
+++ b/chat-server/src/main/java/com/bjtds/brichat/util/SheetHandler.java
@@ -198,7 +198,7 @@ public class SheetHandler extends DefaultHandler {
                 // ✅ 根据类型返回不同格式
                 if (numeric < 1) {
                     // 纯时间 → 自动补上默认日期
-                    return String.format("1970-01-01 %02d:%02d:%02d", hours, minutes, seconds);
+                    return String.format(" %02d:%02d:%02d", hours, minutes, seconds);
                 } else if (fraction == 0) {
                     // 纯日期
                     return String.format("%1$tY-%1$tm-%1$td", base);