diff --git a/frontend/src/hooks/useDebounce.js b/frontend/src/hooks/useDebounce.js
new file mode 100644
index 0000000..74e201b
--- /dev/null
+++ b/frontend/src/hooks/useDebounce.js
@@ -0,0 +1,74 @@
+import { useState, useEffect } from 'react';
+
+/**
+ * 防抖 Hook
+ * @param {any} value - 需要防抖的值
+ * @param {number} delay - 延迟时间（毫秒）
+ * @returns {any} 防抖后的值
+ *
+ * @example
+ * const [keyword, setKeyword] = useState('');
+ * const debouncedKeyword = useDebounce(keyword, 300);
+ *
+ * useEffect(() => {
+ *   // 只有在停止输入 300ms 后才会执行
+ *   fetchData(debouncedKeyword);
+ * }, [debouncedKeyword]);
+ */
+export function useDebounce(value, delay = 300) {
+  const [debouncedValue, setDebouncedValue] = useState(value);
+
+  useEffect(() => {
+    const timer = setTimeout(() => {
+      setDebouncedValue(value);
+    }, delay);
+
+    return () => {
+      clearTimeout(timer);
+    };
+  }, [value, delay]);
+
+  return debouncedValue;
+}
+
+/**
+ * 防抖函数 Hook（用于回调函数）
+ * @param {Function} callback - 需要防抖的回调函数
+ * @param {number} delay - 延迟时间（毫秒）
+ * @returns {Function} 防抖后的函数
+ *
+ * @example
+ * const debouncedSearch = useDebouncedCallback((value) => {
+ *   fetchData(value);
+ * }, 300);
+ *
+ * <Input onChange={e => debouncedSearch(e.target.value)} />
+ */
+export function useDebouncedCallback(callback, delay = 300) {
+  const [timeoutId, setTimeoutId] = useState(null);
+
+  const debouncedFn = (...args) => {
+    if (timeoutId) {
+      clearTimeout(timeoutId);
+    }
+
+    const newTimeoutId = setTimeout(() => {
+      callback(...args);
+    }, delay);
+
+    setTimeoutId(newTimeoutId);
+  };
+
+  // 清理函数
+  useEffect(() => {
+    return () => {
+      if (timeoutId) {
+        clearTimeout(timeoutId);
+      }
+    };
+  }, [timeoutId]);
+
+  return debouncedFn;
+}
+
+export default useDebounce;
diff --git a/frontend/src/pages/CategoryManagement.jsx b/frontend/src/pages/CategoryManagement.jsx
index 811eff5..7530411 100644
--- a/frontend/src/pages/CategoryManagement.jsx
+++ b/frontend/src/pages/CategoryManagement.jsx
@@ -1,4 +1,5 @@
 import React, { useState, useEffect } from 'react';
+import { useDebounce } from '../hooks/useDebounce';
 import {
   Table,
   Button,
@@ -31,13 +32,14 @@ function CategoryManagement() {
     showTotal: total => `共 ${total} 条记录`,
   });
   const [keyword, setKeyword] = useState('');
+  const debouncedKeyword = useDebounce(keyword, 300);
   const [status, setStatus] = useState('all');
 
   const fetchCategories = async (page = 1, pageSize = 10) => {
     try {
       setLoading(true);
       const response = await axios.get('/api/consumable-categories', {
-        params: { page, pageSize, keyword, status },
+        params: { page, pageSize, keyword: debouncedKeyword, status },
       });
       setCategories(response.data.categories);
       setPagination(prev => ({ ...prev, current: page, pageSize, total: response.data.total }));
@@ -51,7 +53,7 @@ function CategoryManagement() {
 
   useEffect(() => {
     fetchCategories();
-  }, [keyword, status]);
+  }, [debouncedKeyword, status]);
 
   const showModal = (category = null) => {
     setEditingCategory(category);
diff --git a/frontend/src/pages/ConsumableManagement.jsx b/frontend/src/pages/ConsumableManagement.jsx
index 0d04b83..62781dc 100644
--- a/frontend/src/pages/ConsumableManagement.jsx
+++ b/frontend/src/pages/ConsumableManagement.jsx
@@ -1,4 +1,5 @@
 import React, { useState, useEffect, useRef, useCallback, useMemo } from 'react';
+import { useDebounce } from '../hooks/useDebounce';
 import {
   Table,
   Button,
@@ -45,6 +46,7 @@ function ConsumableManagement() {
     showTotal: total => `共 ${total} 条记录`,
   });
   const [keyword, setKeyword] = useState('');
+  const debouncedKeyword = useDebounce(keyword, 300);
   const [category, setCategory] = useState('all');
   const [status, setStatus] = useState('all');
   const [importModalVisible, setImportModalVisible] = useState(false);
@@ -65,7 +67,7 @@ function ConsumableManagement() {
       try {
         setLoading(true);
         const response = await axios.get('/api/consumables', {
-          params: { page, pageSize, keyword, category, status },
+          params: { page, pageSize, keyword: debouncedKeyword, category, status },
         });
         setConsumables(response.data.consumables);
         setPagination(prev => ({ ...prev, current: page, pageSize, total: response.data.total }));
@@ -76,7 +78,7 @@ function ConsumableManagement() {
         setLoading(false);
       }
     },
-    [keyword, category, status]
+    [debouncedKeyword, category, status]
   );
 
   const fetchCategories = useCallback(async () => {
diff --git a/frontend/src/pages/DeviceManagement.jsx b/frontend/src/pages/DeviceManagement.jsx
index fc096e4..2f7e778 100644
--- a/frontend/src/pages/DeviceManagement.jsx
+++ b/frontend/src/pages/DeviceManagement.jsx
@@ -1433,7 +1433,7 @@ function DeviceManagement() {
               value={status}
               onChange={setStatus}
               style={{ width: '140px', borderRadius: designTokens.borderRadius.medium }}
-              dropdownStyle={{ borderRadius: designTokens.borderRadius.medium }}
+              styles={{ popup: { root: { borderRadius: designTokens.borderRadius.medium } } }}
             >
               <Option value="all">所有状态</Option>
               <Option value="running">运行中</Option>
@@ -1448,7 +1448,7 @@ function DeviceManagement() {
               value={type}
               onChange={setType}
               style={{ width: '140px', borderRadius: designTokens.borderRadius.medium }}
-              dropdownStyle={{ borderRadius: designTokens.borderRadius.medium }}
+              styles={{ popup: { root: { borderRadius: designTokens.borderRadius.medium } } }}
             >
               <Option value="all">所有类型</Option>
               <Option value="server">服务器</Option>
@@ -1547,7 +1547,7 @@ function DeviceManagement() {
                 style: { marginTop: '16px' },
               }}
               onChange={handleTableChange}
-              scroll={{ y: 'calc(100vh - 380px)', scrollToFirstRowOnChange: true }}
+              scroll={{ y: 500, scrollToFirstRowOnChange: true }}
               virtual
               components={{
                 header: {
diff --git a/frontend/src/pages/RackManagement.jsx b/frontend/src/pages/RackManagement.jsx
index d102bc6..528db84 100644
--- a/frontend/src/pages/RackManagement.jsx
+++ b/frontend/src/pages/RackManagement.jsx
@@ -1,4 +1,5 @@
 import React, { useState, useEffect, useCallback, useMemo, useRef } from 'react';
+import { useDebounce } from '../hooks/useDebounce';
 import {
   Table,
   Button,
@@ -340,6 +341,7 @@ function RackManagement() {
   const [selectedRackIds, setSelectedRackIds] = useState([]);
   const [viewMode, setViewMode] = useState('table');
   const [searchKeyword, setSearchKeyword] = useState('');
+  const debouncedSearchKeyword = useDebounce(searchKeyword, 300);
   const [statusFilter, setStatusFilter] = useState('all');
   const [roomFilter, setRoomFilter] = useState('all');
   const [pagination, setPagination] = useState({
@@ -366,7 +368,7 @@ function RackManagement() {
             pageSize,
             roomId: roomFilter,
             status: statusFilter,
-            keyword: searchKeyword || undefined,
+            keyword: debouncedSearchKeyword || undefined,
           },
         });
         const { racks: data, total } = response.data;
@@ -379,7 +381,7 @@ function RackManagement() {
         setLoading(false);
       }
     },
-    [roomFilter, statusFilter, searchKeyword]
+    [roomFilter, statusFilter, debouncedSearchKeyword]
   );
 
   const fetchRooms = useCallback(async () => {
@@ -401,7 +403,7 @@ function RackManagement() {
   useEffect(() => {
     setPagination(prev => ({ ...prev, current: 1 }));
     fetchRacks(1, pagination.pageSize);
-  }, [roomFilter, statusFilter, searchKeyword]);
+  }, [roomFilter, statusFilter, debouncedSearchKeyword]);
 
   const handleTableChange = useCallback(
     pagination => {
diff --git a/frontend/src/pages/RoomManagement.jsx b/frontend/src/pages/RoomManagement.jsx
index 5eea3b1..036b06b 100644
--- a/frontend/src/pages/RoomManagement.jsx
+++ b/frontend/src/pages/RoomManagement.jsx
@@ -660,7 +660,7 @@ function RoomManagement() {
               value={statusFilter}
               onChange={setStatusFilter}
               style={{ width: '140px', height: '42px' }}
-              dropdownStyle={{ borderRadius: '10px' }}
+              styles={{ popup: { root: { borderRadius: '10px' } } }}
             >
               <Option value="all">全部状态</Option>
               <Option value="active">在用</Option>