diff --git a/src/main/java/com/knowledge/base/infrastructure/config/ConstantConfig.java b/src/main/java/com/knowledge/base/infrastructure/config/ConstantConfig.java
index 63f7089..64dcdbe 100644
--- a/src/main/java/com/knowledge/base/infrastructure/config/ConstantConfig.java
+++ b/src/main/java/com/knowledge/base/infrastructure/config/ConstantConfig.java
@@ -1,5 +1,6 @@
 package com.knowledge.base.infrastructure.config;
 
+import java.time.LocalDateTime;
 import java.time.format.DateTimeFormatter;
 
 /**
@@ -15,4 +16,6 @@ public class ConstantConfig {
 
     public static final DateTimeFormatter DTF = DateTimeFormatter.ofPattern("yyyy-MM-dd HH:mm:ss");
 
+    public static final LocalDateTime LONG_TERM_EXPIRE_TIME = LocalDateTime.of(9999, 12, 31, 23, 59, 59);
+
 }
diff --git a/src/main/java/com/knowledge/base/infrastructure/north/controller/FileQueryController.java b/src/main/java/com/knowledge/base/infrastructure/north/controller/FileQueryController.java
index 599017a..7ea93b7 100644
--- a/src/main/java/com/knowledge/base/infrastructure/north/controller/FileQueryController.java
+++ b/src/main/java/com/knowledge/base/infrastructure/north/controller/FileQueryController.java
@@ -127,19 +127,40 @@ public class FileQueryController {
             Map<String, Object> item = new LinkedHashMap<>();
             item.put("fileName", dto.getFileName());
             item.put("url", dto.getUrl());
-            if (dto.getExpireTime() != null) {
-                long days = Duration.between(
-                        today.atStartOfDay(),
-                        LocalDateTime.parse(dto.getExpireTime()).toLocalDate().atStartOfDay()
-                ).toDays();
 
-                item.put("daysRemaining", Math.max(days, 0));
+            // 格式化上传时间
+            if (StrUtil.isNotBlank(dto.getUploadTime())) {
+                try {
+                    LocalDateTime uploadTime = LocalDateTime.parse(dto.getUploadTime());
+                    item.put("uploadTime", uploadTime.format(ConstantConfig.DTF));
+                } catch (Exception e) {
+                    item.put("uploadTime", dto.getUploadTime());
+                }
             } else {
-                item.put("daysRemaining", -1);
+                item.put("uploadTime", "-");
             }
+
+            // 格式化剩余天数
+            if (StrUtil.isNotBlank(dto.getExpireTime())) {
+                try {
+                    LocalDateTime expireTime = LocalDateTime.parse(dto.getExpireTime());
+                    if (expireTime.equals(ConstantConfig.LONG_TERM_EXPIRE_TIME)) {
+                        item.put("daysRemaining", "长期有效");
+                    } else {
+                        long days = Duration.between(LocalDateTime.now(), expireTime).toDays();
+                        item.put("daysRemaining", days >= 0 ? "还剩 " + days + " 天" : "已过期");
+                    }
+                } catch (Exception e) {
+                    item.put("daysRemaining", "未知");
+                }
+            } else {
+                item.put("daysRemaining", "未知");
+            }
+
             data.add(item);
         }
 
+
         Map<String, Object> response = new LinkedHashMap<>();
         response.put("total", result.getTotal());
         response.put("currentCount", result.getList().size());