diff --git a/edc-web/app/static/js/test_data.js b/edc-web/app/static/js/test_data.js
index 052368b..eb00ffb 100644
--- a/edc-web/app/static/js/test_data.js
+++ b/edc-web/app/static/js/test_data.js
@@ -99,7 +99,9 @@ async function searchData(page = 1) {
     const dateTo = document.getElementById("search-date-to").value;
     const v = VIEWS[currentView];
 
-    const params = new URLSearchParams({ page, per_page: 20 });
+    const perPage = parseInt(document.getElementById("per-page").value) || 20;
+
+    const params = new URLSearchParams({ page, per_page: perPage });
     if (serial) params.set("serial", serial);
     if (dateFrom) params.set("date_from", dateFrom);
     if (dateTo) params.set("date_to", dateTo);
diff --git a/edc-web/app/templates/test_data.html b/edc-web/app/templates/test_data.html
index 44a9ca7..2fd3d31 100644
--- a/edc-web/app/templates/test_data.html
+++ b/edc-web/app/templates/test_data.html
@@ -23,6 +23,14 @@
     </label>
     <button onclick="searchData(1)" class="btn-search">搜索</button>
     <button onclick="exportCSV()" class="btn-export">导出 CSV</button>
+    <label style="margin-left:16px;">
+        每页：
+        <select id="per-page" onchange="searchData(1)" style="width:70px;">
+            <option value="20">20</option>
+            <option value="50">50</option>
+            <option value="100">100</option>
+        </select>
+    </label>
 </div>
 
 <table id="test-data-table">