diff --git a/api.php b/api.php
index 697a32d..1fb2d9d 100644
--- a/api.php
+++ b/api.php
@@ -217,6 +217,7 @@ try {
             $statOf = static function (array $stu, array $rs, int $fs): array {
                 $total     = count($stu);
                 $submitted = count($rs);
+                $attempts  = array_sum(array_map(static fn($r) => (int)($r['attempts'] ?? 1), $rs));
                 $scores    = array_values(array_filter(array_map(static fn($r) => $r['score'] ?? null, $rs), static fn($v) => $v !== null));
                 $avg       = $scores !== [] ? round(array_sum($scores) / count($scores), 2) : null;
                 $pass      = count(array_filter($rs, static fn($r) => ($r['score'] ?? null) !== null && ($r['score'] >= 0.6 * $fs)));
@@ -226,6 +227,7 @@ try {
                 return [
                     'total'        => $total,
                     'submitted'    => $submitted,
+                    'attempts'     => $attempts,
                     'absent'       => max(0, $total - $submitted),
                     'rate'         => $total > 0 ? round($submitted / $total * 100, 1) : 0,
                     'avg'          => $avg,
@@ -237,13 +239,16 @@ try {
             };
 
             // 已提交成员榜：按成绩从高到低，缺成绩者排最后，并给出排名
+            // 透传 attempts / attempts_list，供前端展示"同人多刷卷"
             $membersOf = static function (array $rs): array {
                 $ms = [];
                 foreach ($rs as $r) {
                     $ms[] = [
-                        'sid'   => (string)($r['sid'] ?? ''),
-                        'name'  => (string)($r['name'] ?? ''),
-                        'score' => ($r['score'] ?? null),
+                        'sid'           => (string)($r['sid'] ?? ''),
+                        'name'          => (string)($r['name'] ?? ''),
+                        'score'         => ($r['score'] ?? null),
+                        'attempts'      => (int)($r['attempts'] ?? 1),
+                        'attempts_list' => $r['attempts_list'] ?? [],
                     ];
                 }
                 usort($ms, static function (array $a, array $b): int {
@@ -440,7 +445,7 @@ try {
                     fputcsv($out, [$r['sid'] ?? '', $r['name'] ?? '', $r['cls'] ?? '', $r['grp'] ?? '']);
                 }
             } else {
-                fputcsv($out, ['学号', '姓名', '班级', '组别', '成绩', '提交时间', '考试时长', '考试时长(秒)']);
+                fputcsv($out, ['学号', '姓名', '班级', '组别', '成绩', '提交时间', '考试时长', '考试时长(秒)', '刷题次数']);
                 foreach ($rows as $r) {
                     fputcsv($out, [
                         $r['sid'] ?? '',
@@ -451,6 +456,7 @@ try {
                         $r['submit_at'] ?? '',
                         $r['duration_txt'] ?? '',
                         $r['duration'] === null ? '' : $r['duration'],
+                        (int)($r['attempts'] ?? 1),
                     ]);
                 }
             }
diff --git a/assets/app.js b/assets/app.js
index 12ef974..95373f4 100644
--- a/assets/app.js
+++ b/assets/app.js
@@ -447,10 +447,13 @@
       const sig = r.sid + '|' + r.score + '|' + r.submit_at;
       const changed = state.prevMap[r.sid] && state.prevMap[r.sid] !== sig;
       const isNew = r.sid && state.newSids.has(r.sid);
-      const clsName = (changed ? 'diff ' : '') + (isNew ? 'new' : '');
-      return '<tr class="' + clsName.trim() + '">' +
+      const canDrill = (r.attempts || 1) > 1;
+      const clsName = (changed ? 'diff ' : '') + (isNew ? 'new ' : '') + (canDrill ? 'clickable' : '');
+      const att = canDrill ? ' <span class="tag tag-att" title="查看 ' + r.attempts + ' 次提交明细">刷' + r.attempts + '次</span>' : '';
+      const onclk = canDrill ? ' onclick="openAttemptsModal(' + JSON.stringify(r.sid) + ')"' : '';
+      return '<tr class="' + clsName.trim() + '"' + onclk + '>' +
         '<td class="sid">' + esc(r.sid) + '</td>' +
-        '<td class="name">' + esc(r.name) + '</td>' +
+        '<td class="name">' + esc(r.name) + att + '</td>' +
         '<td>' + esc(r.cls || '') + '</td>' +
         '<td>' + esc(r.grp || '') + '</td>' +
         '<td class="score num ' + scoreClass(r.score) + '">' + (r.score == null ? '-' : r.score) + '</td>' +
@@ -499,6 +502,28 @@
       '</td><td class="num">' + esc(u.submit_at) + '</td></tr>').join('');
   }
 
+  /* 多次刷题下钻弹窗（主统计页成绩明细） */
+  function openAttemptsModal(sid) {
+    const r = (state.rows || []).find(x => String(x.sid) === String(sid));
+    if (!r || (r.attempts || 1) <= 1) return;
+    const list = r.attempts_list || [];
+    const rows = list.map(a => {
+      const sc = a.score == null ? '<span class="muted">未判分</span>' : esc(a.score);
+      const tmp = a.temp_save ? ' <span class="tag tag-gray">暂存</span>' : '';
+      return '<tr><td class="num">' + esc(a.submit_at) + '</td><td class="num">' + sc + tmp +
+        '</td><td class="num">' + esc(a.duration_txt || '-') + '</td></tr>';
+    }).join('');
+    $('#attTitle').textContent = (r.name || '') + ' · 共 ' + r.attempts + ' 次提交';
+    $('#attBody').innerHTML = list.length
+      ? '<table class="grid compact"><thead><tr><th>提交时间</th><th>成绩</th><th>考试时长</th></tr></thead><tbody>' + rows + '</tbody></table>'
+      : '<div class="empty">无提交明细</div>';
+    $('#attemptsModal').classList.add('open');
+  }
+  function closeAttemptsModal() {
+    const m = $('#attemptsModal');
+    if (m) m.classList.remove('open');
+  }
+
   /* ---------------- 自动刷新 ---------------- */
   function schedule() {
     if (state.timer) clearInterval(state.timer);
diff --git a/assets/style.css b/assets/style.css
index c67e020..95a01bc 100644
--- a/assets/style.css
+++ b/assets/style.css
@@ -311,6 +311,12 @@ table.grid tbody tr.new:hover td { background: #d6f2e2; }
 .tag-ok { background: var(--ok-weak); color: var(--ok); }
 .tag-warn { background: var(--warn-weak); color: var(--warn); }
 .tag-gray { background: var(--border-2); color: var(--text-3); }
+.tag-att { background: #e8eefc; color: #3457c9; cursor: pointer; }
+
+/* 多次刷题：成员榜可点击行 */
+tr.clickable { cursor: pointer; }
+tr.clickable:hover td { background: var(--border-2); }
+.muted { color: var(--text-3); }
 
 /* ---------- 弹窗 ---------- */
 .modal {
diff --git a/dashboard.php b/dashboard.php
index a2e733d..001dc4b 100644
--- a/dashboard.php
+++ b/dashboard.php
@@ -71,7 +71,21 @@ if (!ny_is_auth()) {
 
 </div>
 
+<!-- 多次刷题明细弹窗 -->
+<div class="modal" id="attemptsModal">
+  <div class="modal-box">
+    <div class="modal-head"><h3 id="attTitle">提交明细</h3><button class="x" data-close onclick="closeAttempts()">&times;</button></div>
+    <div class="modal-body" id="attBody"></div>
+  </div>
+</div>
+
 <script>
+// 弹窗：点击遮罩或带 data-close 的元素关闭
+document.querySelectorAll('.modal').forEach(m => {
+  m.addEventListener('click', e => {
+    if (e.target === m || e.target.hasAttribute('data-close')) m.classList.remove('open');
+  });
+});
 const $ = s => document.querySelector(s);
 function esc(s){ return String(s == null ? '' : s).replace(/[&<>"]/g, c => ({'&':'&amp;','<':'&lt;','>':'&gt;','"':'&quot;'}[c])); }
 function rateColor(r){
@@ -204,7 +218,7 @@ async function refreshClassSel(){
   }
 }
 
-/* ---------- 成员榜 ---------- */
+/* ---------- 成员榜（含多次刷题徽标与下钻） ---------- */
 function membersTable(members){
   if (!members || !members.length) {
     return '<div class="empty" style="padding:18px 0">暂无考试成员</div>';
@@ -213,18 +227,45 @@ function membersTable(members){
     '<thead><tr><th style="width:60px">排名</th><th>姓名</th><th style="width:80px">成绩</th></tr></thead><tbody>' +
     members.map(m => {
       const rk = m.rank;
-      const badge = rk === 1 ? 'rk rk-1' : (rk === 2 ? 'rk rk-2' : (rk === 3 ? 'rk rk-3' : 'rk'));
+      const badge = rk === 1 ? 'rk rk-1' : (rk === 2 ? 'rk rk-2' : (rk === 3 ? 'rk rk-3' : 'rk');
       const sc = m.score;
       const cls = sc == null ? '' : (sc >= 90 ? 'score-high' : (sc >= 60 ? 'score-mid' : 'score-low'));
-      return '<tr>' +
+      const att = (m.attempts || 1) > 1;
+      const tag = att ? ' <span class="tag tag-att" title="查看 ' + m.attempts + ' 次提交明细">刷' + m.attempts + '次</span>' : '';
+      return '<tr' + (att ? ' class="clickable" onclick="openAttempts(' + JSON.stringify(m.sid) + ')"' : '') + '>' +
         '<td class="num"><span class="' + badge + '">' + rk + '</span></td>' +
-        '<td class="name">' + esc(m.name) + '</td>' +
+        '<td class="name">' + esc(m.name) + tag + '</td>' +
         '<td class="score num ' + cls + '">' + (sc == null ? '-' : sc) + '</td>' +
       '</tr>';
     }).join('') +
     '</tbody></table></div>';
 }
 
+/* ---------- 多次刷题下钻弹窗 ---------- */
+function openAttempts(sid){
+  const info = (window.MEMBER_ATT || {})[sid];
+  if (!info) return;
+  const list = info.list || [];
+  const rows = list.map(a => {
+    const sc = a.score == null ? '<span class="muted">未判分</span>' : esc(a.score);
+    const tmp = a.temp_save ? ' <span class="tag tag-gray">暂存</span>' : '';
+    return '<tr>' +
+      '<td class="num">' + esc(a.submit_at) + '</td>' +
+      '<td class="num">' + sc + tmp + '</td>' +
+      '<td class="num">' + esc(a.duration_txt || '-') + '</td>' +
+    '</tr>';
+  }).join('');
+  $('#attTitle').textContent = info.name + ' · 共 ' + (info.attempts || list.length) + ' 次提交';
+  $('#attBody').innerHTML = list.length
+    ? '<table class="grid compact"><thead><tr><th>提交时间</th><th>成绩</th><th>考试时长</th></tr></thead><tbody>' + rows + '</tbody></table>'
+    : '<div class="empty">无提交明细</div>';
+  document.querySelector('#attemptsModal').classList.add('open');
+}
+function closeAttempts(){
+  const m = document.querySelector('#attemptsModal');
+  if (m) m.classList.remove('open');
+}
+
 /* ---------- 渲染单班看板 ---------- */
 function renderBoard(){
   const pid = $('#projectSel').value;
@@ -252,8 +293,21 @@ function renderBoard(){
   // 顶部品牌区：动态标题
   const projectName = ($('#projectSel').selectedOptions[0] || {}).textContent || '';
   $('#heroTitle').textContent = cls + ' · 班级看板';
+
+  // 构建"学号 -> 多次刷题明细"映射（班级级 members 已含全班所有人的 attempts_list）
+  const MAP = {};
+  (c.members || []).forEach(m => {
+    if ((m.attempts || 1) > 1) {
+      MAP[m.sid] = { name: m.name, attempts: m.attempts, list: m.attempts_list || [] };
+    }
+  });
+  window.MEMBER_ATT = MAP;
+
+  const overall = DASH.overall || {};
+  const totalAttempts = (overall.attempts_total || 0);
   $('#heroSub').textContent = '问卷：' + projectName.replace(/\uff08\d+份\uff09$/, '') + ' · ' +
-    '总 ' + c.total + ' / 已交 ' + c.submitted + ' / 缺考 ' + c.absent;
+    '总 ' + c.total + ' / 已交 ' + c.submitted + ' / 缺考 ' + c.absent +
+    (totalAttempts ? ' · 共 ' + totalAttempts + ' 次提交' : '');
 
   // 6 卡汇总
   const color = rateColor(c.rate || 0);
@@ -271,7 +325,8 @@ function renderBoard(){
     box.innerHTML = '<div class="gpanel">' +
       '<div class="ghead"><strong>本班考试成员</strong>' +
       '<span class="rate-num">' + c.submitted + ' 人</span></div>' +
-      '<div class="sub">该班级未设置分组（A/B），以下按成绩从高到低排列</div>' +
+      '<div class="sub">该班级未设置分组（A/B），以下按成绩从高到低排列' +
+      (c.attempts > c.submitted ? ' · 共 ' + c.attempts + ' 次刷题' : '') + '</div>' +
       membersTable(c.members) + '</div>';
   } else {
     box.innerHTML = '<div class="group-compare">' + groups.map(g => {
@@ -279,7 +334,8 @@ function renderBoard(){
       return '<div class="gpanel">' +
         '<div class="ghead"><strong>' + esc(g.group) + ' 组</strong>' +
         '<span class="rate-num" style="color:' + gc + '">' + g.rate + '%</span></div>' +
-        '<div class="sub">已提交 ' + g.submitted + ' / 总人数 ' + g.total + ' · 缺考 ' + g.absent + '</div>' +
+        '<div class="sub">已提交 ' + g.submitted + ' / 总人数 ' + g.total + ' · 缺考 ' + g.absent +
+        (g.attempts > g.submitted ? ' · 共 ' + g.attempts + ' 次刷题' : '') + '</div>' +
         '<div class="bar"><i style="width:' + g.rate + '%;background:' + gc + '"></i></div>' +
         '<div class="class-metrics">' +
           '<div class="m"><span>平均分</span><b>' + (g.avg != null ? g.avg : '-') + '</b></div>' +
diff --git a/index.php b/index.php
index fb4e259..9df731e 100644
--- a/index.php
+++ b/index.php
@@ -263,6 +263,14 @@ $rosterCount = Roster::count();
   </div>
 </div>
 
+<!-- 多次刷题明细弹窗 -->
+<div class="modal" id="attemptsModal">
+  <div class="modal-box">
+    <div class="modal-head"><h3 id="attTitle">提交明细</h3><button class="x" data-close>&times;</button></div>
+    <div class="modal-body" id="attBody"></div>
+  </div>
+</div>
+
 <script>
 window.NY = {
   appName: <?= json_encode(NY_APP_NAME, JSON_UNESCAPED_UNICODE) ?>,
diff --git a/lib/DataService.php b/lib/DataService.php
index 53d1ea2..85e64f1 100644
--- a/lib/DataService.php
+++ b/lib/DataService.php
@@ -128,9 +128,8 @@ class DataService
         $includeTemp = !empty($cfg['include_temp_save']);
         $dedupe      = !empty($cfg['dedupe']);
 
-        $rows      = [];
+        $rawRows   = [];   // 已匹配学号的原始 row（每条 = 一次提交）
         $unmatched = [];
-        $seenSid   = [];
 
         foreach ($answers as $a) {
             $tempSave = isset($a['tempSave']) ? (int)$a['tempSave'] : 1;
@@ -226,19 +225,15 @@ class DataService
                 continue;
             }
 
-            if ($dedupe && isset($seenSid[$sid])) {
-                $idx = $seenSid[$sid];
-                // 保留提交时间最新的一份
-                if ($ts >= ($rows[$idx]['submit_ts'] ?? 0)) {
-                    $rows[$idx] = $row;
-                    $seenSid[$sid] = $idx;
-                }
-                continue;
-            }
-            $seenSid[$sid] = count($rows);
-            $rows[] = $row;
+            $rawRows[] = $row;
         }
 
+        // 按学号聚合：dedupe=true 仅保留最新一份；false 则每名一行（代表=最高分）
+        // 并附带 attempts(次数) / attempts_list(每次提交明细)，供看板展示"多次刷题"
+        $agg           = self::aggregateByStudent($rawRows, $dedupe);
+        $rows          = $agg['rows'];
+        $attemptsTotal = $agg['attempts_total'];
+
         // 成绩明细默认按提交时间降序（最新在前），学号作为次级排序
         usort($rows, static function (array $x, array $y): int {
             $d = ($y['submit_ts'] ?? 0) <=> ($x['submit_ts'] ?? 0);
@@ -292,6 +287,7 @@ class DataService
             'min_score'     => $scores !== [] ? min($scores) : null,
             'avg_duration'  => $durs !== [] ? (int)round(array_sum($durs) / count($durs)) : null,
             'answer_total'  => count($answers),
+            'attempts_total'=> $attemptsTotal,
         ];
 
         return [
@@ -312,4 +308,68 @@ class DataService
             'updated_at' => date('Y-m-d H:i:s'),
         ];
     }
+
+    /**
+     * 按学号聚合一次提交的答卷记录，解决"同人多次刷卷"在看板中被当成多个人的问题。
+     * - dedupe=true：每学号仅保留提交时间最新的一份（原行为）
+     * - dedupe=false：每学号一行，代表成绩取最高分，附 attempts(次数) / attempts_list(每次提交明细)
+     *
+     * @param array $rows 已匹配学号的原始 row（每条 = 一次提交）
+     * @return array{rows:array, attempts_total:int}
+     */
+    public static function aggregateByStudent(array $rows, bool $dedupe): array
+    {
+        $bySid = [];
+        foreach ($rows as $r) {
+            $bySid[(string)($r['sid'] ?? '')][] = $r;
+        }
+        $agg = [];
+        $attemptsTotal = 0;
+        foreach ($bySid as $sid => $list) {
+            $attemptsTotal += count($list);
+            // 升序：旧 -> 新
+            $sorted = $list;
+            usort($sorted, static function (array $x, array $y): int {
+                return ($x['submit_ts'] ?? 0) <=> ($y['submit_ts'] ?? 0);
+            });
+            $attemptsList = array_map(static function (array $a): array {
+                return [
+                    'submit_at'    => $a['submit_at'],
+                    'submit_ts'    => $a['submit_ts'],
+                    'score'        => $a['score'],
+                    'duration'     => $a['duration'],
+                    'duration_txt' => $a['duration_txt'],
+                    'answer_id'    => $a['answer_id'],
+                    'temp_save'    => $a['temp_save'],
+                ];
+            }, $sorted);
+
+            if ($dedupe) {
+                // 仅保留提交时间最新的一份（明细列表也只留这一份，与"只保留最新"语义一致）
+                $row = $sorted[count($sorted) - 1];
+                $row['attempts']      = 1;
+                $row['best_score']    = $row['score'];
+                $row['attempts_list'] = [$attemptsList[count($attemptsList) - 1]];
+            } else {
+                // 代表成绩取最高分（null 成绩不参与比较，全部为 null 时回退为最近一份）
+                $best = null;
+                $bestScore = null;
+                foreach ($sorted as $a) {
+                    if ($a['score'] !== null && ($bestScore === null || $a['score'] > $bestScore)) {
+                        $bestScore = $a['score'];
+                        $best = $a;
+                    }
+                }
+                if ($best === null) {
+                    $best = $sorted[count($sorted) - 1];
+                }
+                $row = $best;
+                $row['attempts']      = count($list);
+                $row['best_score']    = $bestScore;
+                $row['attempts_list'] = $attemptsList;
+            }
+            $agg[] = $row;
+        }
+        return ['rows' => $agg, 'attempts_total' => $attemptsTotal];
+    }
 }