diff --git a/frontend/src/components/TaskCard.vue b/frontend/src/components/TaskCard.vue
index 34692fd..2b8ac2c 100644
--- a/frontend/src/components/TaskCard.vue
+++ b/frontend/src/components/TaskCard.vue
@@ -133,19 +133,19 @@
 
     <!-- 时间信息 -->
     <div class="task-footer">
-      <div class="footer-item">
+      <div class="footer-item" :title="formatFullDateTime(task.createTime)">
         <Icon name="calendar" size="sm" color="#31f08b" />
         <span style="color: #ffffff;">发布: {{ formatDate(task.createTime) }}</span>
       </div>
-      <div v-if="task.deadline && task.status === 'in_progress'" class="footer-item">
+      <div v-if="task.deadline && task.status === 'in_progress'" class="footer-item" :title="formatFullDateTime(task.deadline)">
         <Icon name="clock" size="sm" color="#31f08b" />
         <span style="color: #ffffff;">截止: {{ formatDate(task.deadline) }}</span>
       </div>
-      <div v-if="task.completeTime && task.status === 'completed'" class="footer-item">
+      <div v-if="task.completeTime && task.status === 'completed'" class="footer-item" :title="formatFullDateTime(task.completeTime)">
         <Icon name="check" size="sm" color="#31f08b" />
         <span style="color: #ffffff;">完成: {{ formatDate(task.completeTime) }}</span>
       </div>
-      <div v-if="task.submitTime && task.status === 'review'" class="footer-item">
+      <div v-if="task.submitTime && task.status === 'review'" class="footer-item" :title="formatFullDateTime(task.submitTime)">
         <Icon name="upload" size="sm" color="#31f08b" />
         <span style="color: #ffffff;">提交: {{ formatDate(task.submitTime) }}</span>
       </div>
@@ -288,12 +288,18 @@ const getTaskTypeName = (taskTypeId: number) => {
   return type?.name || '--'
 }
 
-// 格式化日期
+// 格式化日期（简短显示）
 const formatDate = (date?: string) => {
   if (!date) return '--'
   return dayjs(date).format('YYYY-MM-DD HH:mm')
 }
 
+// 格式化完整日期时间（用于鼠标悬停提示）
+const formatFullDateTime = (date?: string) => {
+  if (!date) return ''
+  return dayjs(date).format('YYYY年MM月DD日 HH:mm:ss')
+}
+
 // 复制任务编号
 const handleCopyTaskNo = async (taskNo: string) => {
   try {
diff --git a/frontend/src/views/TaskHall.vue b/frontend/src/views/TaskHall.vue
index 8bc21b7..94e1bc9 100644
--- a/frontend/src/views/TaskHall.vue
+++ b/frontend/src/views/TaskHall.vue
@@ -260,7 +260,7 @@
                 </span>
                 <span>时效要求: {{ formatEstimatedTime(task.estimatedHours) }}</span>
               </div>
-              <div class="detail-item">
+              <div class="detail-item" :title="formatFullDateTime(task.createTime)">
                 <span class="icon">
                   <Icon name="calendar" size="sm" color="#31f08b" />
                 </span>
@@ -872,16 +872,16 @@
                       title="复制任务编号"
                     />
                   </div>
-                  <div class="footer-item">
+                  <div class="footer-item" :title="formatFullDateTime(task.createTime)">
                     <Icon name="calendar" size="sm" color="#31f08b" />
                     <span style="color: #ffffff;">发布: {{ formatTime(task.createTime) }}</span>
                   </div>
-                  <div class="footer-item" v-if="task.estimatedHours">
+                  <div class="footer-item" v-if="task.estimatedHours" :title="'时效要求: ' + formatEstimatedTime(task.estimatedHours)">
                     <Icon name="clock" size="sm" color="#31f08b" />
                     <span style="color: #ffffff;">时效要求: {{ formatEstimatedTime(task.estimatedHours) }}</span>
                   </div>
                   <!-- 驳回时间 -->
-                  <div class="footer-item" v-if="task.approvalStatus?.includes('rejected') && task.updateTime">
+                  <div class="footer-item" v-if="task.approvalStatus?.includes('rejected') && task.updateTime" :title="formatFullDateTime(task.updateTime)">
                     <Icon name="x-circle" size="sm" color="#f5222d" />
                     <span style="color: #f5222d;">驳回: {{ formatTime(task.updateTime) }}</span>
                   </div>
@@ -1215,11 +1215,11 @@
                       title="复制任务编号"
                     />
                   </div>
-                  <div class="footer-item">
+                  <div class="footer-item" :title="formatFullDateTime(task.createTime)">
                     <Icon name="calendar" size="sm" color="#31f08b" />
                     <span style="color: #ffffff;">发布: {{ formatDate(task.createTime) }}</span>
                   </div>
-                  <div v-if="task.completeTime && task.status === 'completed'" class="footer-item">
+                  <div v-if="task.completeTime && task.status === 'completed'" class="footer-item" :title="formatFullDateTime(task.completeTime)">
                     <Icon name="check" size="sm" color="#31f08b" />
                     <span style="color: #ffffff;">完成: {{ formatDate(task.completeTime) }}</span>
                   </div>
@@ -1551,16 +1551,16 @@
                       title="复制任务编号"
                     />
                   </div>
-                  <div class="footer-item">
+                  <div class="footer-item" :title="formatFullDateTime(task.createTime)">
                     <Icon name="calendar" size="sm" color="#31f08b" />
                     <span style="color: #ffffff;">发布: {{ formatTime(task.createTime) }}</span>
                   </div>
-                  <div class="footer-item" v-if="task.estimatedHours">
+                  <div class="footer-item" v-if="task.estimatedHours" :title="'时效要求: ' + formatEstimatedTime(task.estimatedHours)">
                     <Icon name="clock" size="sm" color="#31f08b" />
                     <span style="color: #ffffff;">时效要求: {{ formatEstimatedTime(task.estimatedHours) }}</span>
                   </div>
                   <!-- 驳回时间 -->
-                  <div class="footer-item" v-if="task.approvalStatus?.includes('rejected') && task.updateTime">
+                  <div class="footer-item" v-if="task.approvalStatus?.includes('rejected') && task.updateTime" :title="formatFullDateTime(task.updateTime)">
                     <Icon name="x-circle" size="sm" color="#f5222d" />
                     <span style="color: #f5222d;">驳回: {{ formatTime(task.updateTime) }}</span>
                   </div>
@@ -1778,11 +1778,11 @@
                       title="复制任务编号"
                     />
                   </div>
-                  <div class="footer-item">
+                  <div class="footer-item" :title="formatFullDateTime(task.createTime)">
                     <Icon name="calendar" size="sm" color="#31f08b" />
                     <span style="color: #ffffff;">创建: {{ formatTime(task.createTime) }}</span>
                   </div>
-                  <div class="footer-item" v-if="task.updateTime && task.updateTime !== task.createTime">
+                  <div class="footer-item" v-if="task.updateTime && task.updateTime !== task.createTime" :title="formatFullDateTime(task.updateTime)">
                     <Icon name="edit" size="sm" color="#faad14" />
                     <span style="color: #faad14;">最后编辑: {{ formatTime(task.updateTime) }}</span>
                   </div>
@@ -3043,6 +3043,12 @@ const formatDate = (date: string | undefined) => {
   return dayjs(date).format('YYYY-MM-DD')
 }
 
+// 格式化完整日期时间（用于鼠标悬停提示）
+const formatFullDateTime = (date: string | undefined) => {
+  if (!date) return ''
+  return dayjs(date).format('YYYY年MM月DD日 HH:mm:ss')
+}
+
 // 格式化积分（保留两位小数，修复浮点数精度问题）
 const formatScore = (score: number | null | undefined): string => {
   if (score === null || score === undefined) return '0.00'