diff --git a/edc-web/app/models.py b/edc-web/app/models.py
index 161e2b2..485f087 100644
--- a/edc-web/app/models.py
+++ b/edc-web/app/models.py
@@ -168,10 +168,10 @@ def get_test_data(page: int = 1, per_page: int = 20,
                 params.append(f"%{serial}%")
             if date_from:
                 where.append("t.create_time >= %s")
-                params.append(date_from)
+                params.append(date_from if len(date_from) > 10 else date_from)
             if date_to:
                 where.append("t.create_time <= %s")
-                params.append(date_to + " 23:59:59")
+                params.append(date_to if len(date_to) > 10 else date_to + " 23:59:59")
             if test_mode:
                 where.append("t.test_mode = %s")
                 params.append(int(test_mode))
@@ -223,10 +223,10 @@ def get_all_test_data_for_export(serial: str = "", date_from: str = "",
                 params.append(f"%{serial}%")
             if date_from:
                 where.append("t.create_time >= %s")
-                params.append(date_from)
+                params.append(date_from if len(date_from) > 10 else date_from)
             if date_to:
                 where.append("t.create_time <= %s")
-                params.append(date_to + " 23:59:59")
+                params.append(date_to if len(date_to) > 10 else date_to + " 23:59:59")
             if test_mode:
                 where.append("t.test_mode = %s")
                 params.append(int(test_mode))
@@ -602,10 +602,10 @@ def delete_test_data(serial: str = "", date_from: str = "",
                 params.append(f"%{serial}%")
             if date_from:
                 where.append("t.create_time >= %s")
-                params.append(date_from)
+                params.append(date_from if len(date_from) > 10 else date_from)
             if date_to:
                 where.append("t.create_time <= %s")
-                params.append(date_to + " 23:59:59")
+                params.append(date_to if len(date_to) > 10 else date_to + " 23:59:59")
             if data_source:
                 where.append("t.data_source = %s")
                 params.append(data_source)
diff --git a/edc-web/app/static/js/test_data.js b/edc-web/app/static/js/test_data.js
index 89330a8..eec7124 100644
--- a/edc-web/app/static/js/test_data.js
+++ b/edc-web/app/static/js/test_data.js
@@ -119,11 +119,20 @@ function switchView(view) {
 
 // ─── 查询 ────────────────────────────────────────
 
+/** 合并日期和时间输入框，返回 "YYYY-MM-DD" 或 "YYYY-MM-DD HH:MM:SS" 或 "" */
+function getDatetime(dateId, timeId) {
+    const d = document.getElementById(dateId).value;
+    const t = document.getElementById(timeId).value;
+    if (!d) return "";
+    if (!t) return d;
+    return d + " " + t;
+}
+
 async function searchData(page = 1) {
     currentPage = page;
     const serial = document.getElementById("search-serial").value;
-    const dateFrom = document.getElementById("search-date-from").value;
-    const dateTo = document.getElementById("search-date-to").value;
+    const dateFrom = getDatetime("search-date-from", "search-time-from");
+    const dateTo = getDatetime("search-date-to", "search-time-to");
     const v = VIEWS[currentView];
 
     const perPage = parseInt(document.getElementById("per-page").value) || 20;
@@ -200,8 +209,8 @@ function renderPagination() {
 
 function exportCSV() {
     const serial = document.getElementById("search-serial").value;
-    const dateFrom = document.getElementById("search-date-from").value;
-    const dateTo = document.getElementById("search-date-to").value;
+    const dateFrom = getDatetime("search-date-from", "search-time-from");
+    const dateTo = getDatetime("search-date-to", "search-time-to");
     const v = VIEWS[currentView];
 
     const params = new URLSearchParams();
@@ -293,8 +302,8 @@ async function loadChart() {
     if (!container || container.style.display === 'none') return;
 
     const serial = document.getElementById('search-serial').value;
-    const dateFrom = document.getElementById('search-date-from').value;
-    const dateTo = document.getElementById('search-date-to').value;
+    const dateFrom = getDatetime('search-date-from', 'search-time-from');
+    const dateTo = getDatetime('search-date-to', 'search-time-to');
     const v = VIEWS[currentView];
 
     // 全部视图不适用，用 B2 或 B4
@@ -416,8 +425,8 @@ searchData(1);
 
 function confirmDelete() {
     const serial = document.getElementById('search-serial').value;
-    const dateFrom = document.getElementById('search-date-from').value;
-    const dateTo = document.getElementById('search-date-to').value;
+    const dateFrom = getDatetime('search-date-from', 'search-time-from');
+    const dateTo = getDatetime('search-date-to', 'search-time-to');
     const v = VIEWS[currentView];
     const ds = v.data_source || '';
 
diff --git a/edc-web/app/templates/test_data.html b/edc-web/app/templates/test_data.html
index 04a3692..74eeb60 100644
--- a/edc-web/app/templates/test_data.html
+++ b/edc-web/app/templates/test_data.html
@@ -16,10 +16,12 @@
         <input type="text" id="search-serial" placeholder="输入设备编码搜索...">
     </label>
     <label>
-        日期范围：
+        时间范围：
         <input type="date" id="search-date-from">
+        <input type="time" id="search-time-from" step="1" style="width:110px;" title="起始时间（时:分:秒）">
         至
         <input type="date" id="search-date-to">
+        <input type="time" id="search-time-to" step="1" style="width:110px;" title="截止时间（时:分:秒）">
     </label>
     <button onclick="searchData(1)" class="btn-search">搜索</button>
     <button onclick="exportCSV()" class="btn-export">导出 CSV</button>