diff --git a/trader/binance_futures.go b/trader/binance_futures.go
index db6a443a..ae85afa4 100644
--- a/trader/binance_futures.go
+++ b/trader/binance_futures.go
@@ -5,6 +5,7 @@ import (
 	"fmt"
 	"log"
 	"strconv"
+	"sync"
 	"time"
 
 	"github.com/adshao/go-binance/v2/futures"
@@ -13,19 +14,44 @@ import (
 // FuturesTrader 币安合约交易器
 type FuturesTrader struct {
 	client *futures.Client
+
+	// 余额缓存
+	cachedBalance     map[string]interface{}
+	balanceCacheTime  time.Time
+	balanceCacheMutex sync.RWMutex
+
+	// 持仓缓存
+	cachedPositions     []map[string]interface{}
+	positionsCacheTime  time.Time
+	positionsCacheMutex sync.RWMutex
+
+	// 缓存有效期（15秒）
+	cacheDuration time.Duration
 }
 
 // NewFuturesTrader 创建合约交易器
 func NewFuturesTrader(apiKey, secretKey string) *FuturesTrader {
 	client := futures.NewClient(apiKey, secretKey)
 	return &FuturesTrader{
-		client: client,
+		client:        client,
+		cacheDuration: 15 * time.Second, // 15秒缓存
 	}
 }
 
-// GetBalance 获取账户余额
+// GetBalance 获取账户余额（带缓存）
 func (t *FuturesTrader) GetBalance() (map[string]interface{}, error) {
-	log.Printf("🔄 正在调用币安API获取账户余额...")
+	// 先检查缓存是否有效
+	t.balanceCacheMutex.RLock()
+	if t.cachedBalance != nil && time.Since(t.balanceCacheTime) < t.cacheDuration {
+		cacheAge := time.Since(t.balanceCacheTime)
+		t.balanceCacheMutex.RUnlock()
+		log.Printf("✓ 使用缓存的账户余额（缓存时间: %.1f秒前）", cacheAge.Seconds())
+		return t.cachedBalance, nil
+	}
+	t.balanceCacheMutex.RUnlock()
+
+	// 缓存过期或不存在，调用API
+	log.Printf("🔄 缓存过期，正在调用币安API获取账户余额...")
 	account, err := t.client.NewGetAccountService().Do(context.Background())
 	if err != nil {
 		log.Printf("❌ 币安API调用失败: %v", err)
@@ -42,11 +68,29 @@ func (t *FuturesTrader) GetBalance() (map[string]interface{}, error) {
 		account.AvailableBalance,
 		account.TotalUnrealizedProfit)
 
+	// 更新缓存
+	t.balanceCacheMutex.Lock()
+	t.cachedBalance = result
+	t.balanceCacheTime = time.Now()
+	t.balanceCacheMutex.Unlock()
+
 	return result, nil
 }
 
-// GetPositions 获取所有持仓
+// GetPositions 获取所有持仓（带缓存）
 func (t *FuturesTrader) GetPositions() ([]map[string]interface{}, error) {
+	// 先检查缓存是否有效
+	t.positionsCacheMutex.RLock()
+	if t.cachedPositions != nil && time.Since(t.positionsCacheTime) < t.cacheDuration {
+		cacheAge := time.Since(t.positionsCacheTime)
+		t.positionsCacheMutex.RUnlock()
+		log.Printf("✓ 使用缓存的持仓信息（缓存时间: %.1f秒前）", cacheAge.Seconds())
+		return t.cachedPositions, nil
+	}
+	t.positionsCacheMutex.RUnlock()
+
+	// 缓存过期或不存在，调用API
+	log.Printf("🔄 缓存过期，正在调用币安API获取持仓信息...")
 	positions, err := t.client.NewGetPositionRiskService().Do(context.Background())
 	if err != nil {
 		return nil, fmt.Errorf("获取持仓失败: %w", err)
@@ -78,6 +122,12 @@ func (t *FuturesTrader) GetPositions() ([]map[string]interface{}, error) {
 		result = append(result, posMap)
 	}
 
+	// 更新缓存
+	t.positionsCacheMutex.Lock()
+	t.cachedPositions = result
+	t.positionsCacheTime = time.Now()
+	t.positionsCacheMutex.Unlock()
+
 	return result, nil
 }
 
diff --git a/web/src/App.tsx b/web/src/App.tsx
index 7cd71e5b..69992f19 100644
--- a/web/src/App.tsx
+++ b/web/src/App.tsx
@@ -42,9 +42,9 @@ function App() {
       : null,
     () => api.getStatus(selectedTraderId),
     {
-      refreshInterval: 5000,
-      revalidateOnFocus: true,
-      dedupingInterval: 0,
+      refreshInterval: 15000, // 15秒刷新（配合后端15秒缓存）
+      revalidateOnFocus: false, // 禁用聚焦时重新验证，减少请求
+      dedupingInterval: 10000, // 10秒去重，防止短时间内重复请求
     }
   );
 
@@ -54,9 +54,9 @@ function App() {
       : null,
     () => api.getAccount(selectedTraderId),
     {
-      refreshInterval: 5000,
-      revalidateOnFocus: true,
-      dedupingInterval: 0,
+      refreshInterval: 15000, // 15秒刷新（配合后端15秒缓存）
+      revalidateOnFocus: false, // 禁用聚焦时重新验证，减少请求
+      dedupingInterval: 10000, // 10秒去重，防止短时间内重复请求
     }
   );
 
@@ -66,9 +66,9 @@ function App() {
       : null,
     () => api.getPositions(selectedTraderId),
     {
-      refreshInterval: 5000,
-      revalidateOnFocus: true,
-      dedupingInterval: 0,
+      refreshInterval: 15000, // 15秒刷新（配合后端15秒缓存）
+      revalidateOnFocus: false, // 禁用聚焦时重新验证，减少请求
+      dedupingInterval: 10000, // 10秒去重，防止短时间内重复请求
     }
   );
 
@@ -77,7 +77,11 @@ function App() {
       ? `decisions/latest-${selectedTraderId}`
       : null,
     () => api.getLatestDecisions(selectedTraderId),
-    { refreshInterval: 10000 }
+    {
+      refreshInterval: 30000, // 30秒刷新（决策更新频率较低）
+      revalidateOnFocus: false,
+      dedupingInterval: 20000,
+    }
   );
 
   const { data: stats } = useSWR<Statistics>(
@@ -85,7 +89,11 @@ function App() {
       ? `statistics-${selectedTraderId}`
       : null,
     () => api.getStatistics(selectedTraderId),
-    { refreshInterval: 10000 }
+    {
+      refreshInterval: 30000, // 30秒刷新（统计数据更新频率较低）
+      revalidateOnFocus: false,
+      dedupingInterval: 20000,
+    }
   );
 
   useEffect(() => {
diff --git a/web/src/components/AILearning.tsx b/web/src/components/AILearning.tsx
index b7757e32..8ef1a840 100644
--- a/web/src/components/AILearning.tsx
+++ b/web/src/components/AILearning.tsx
@@ -50,7 +50,11 @@ export default function AILearning({ traderId }: AILearningProps) {
   const { data: performance, error } = useSWR<PerformanceAnalysis>(
     traderId ? `performance-${traderId}` : 'performance',
     () => api.getPerformance(traderId),
-    { refreshInterval: 10000 }
+    {
+      refreshInterval: 30000, // 30秒刷新（AI学习分析数据更新频率较低）
+      revalidateOnFocus: false,
+      dedupingInterval: 20000,
+    }
   );
 
   if (error) {
diff --git a/web/src/components/ComparisonChart.tsx b/web/src/components/ComparisonChart.tsx
index 4f489458..a21e8593 100644
--- a/web/src/components/ComparisonChart.tsx
+++ b/web/src/components/ComparisonChart.tsx
@@ -33,8 +33,9 @@ export function ComparisonChart({ traders }: ComparisonChartProps) {
       return Promise.all(promises);
     },
     {
-      refreshInterval: 10000,
+      refreshInterval: 30000, // 30秒刷新（对比图表数据更新频率较低）
       revalidateOnFocus: false,
+      dedupingInterval: 20000,
     }
   );
 
diff --git a/web/src/components/CompetitionPage.tsx b/web/src/components/CompetitionPage.tsx
index bc549e38..ca67447c 100644
--- a/web/src/components/CompetitionPage.tsx
+++ b/web/src/components/CompetitionPage.tsx
@@ -11,8 +11,9 @@ export function CompetitionPage() {
     'competition',
     api.getCompetition,
     {
-      refreshInterval: 5000,
-      revalidateOnFocus: true,
+      refreshInterval: 15000, // 15秒刷新（竞赛数据不需要太频繁更新）
+      revalidateOnFocus: false,
+      dedupingInterval: 10000,
     }
   );
 
diff --git a/web/src/components/EquityChart.tsx b/web/src/components/EquityChart.tsx
index 4022c112..b8b846cf 100644
--- a/web/src/components/EquityChart.tsx
+++ b/web/src/components/EquityChart.tsx
@@ -34,7 +34,9 @@ export function EquityChart({ traderId }: EquityChartProps) {
     traderId ? `equity-history-${traderId}` : 'equity-history',
     () => api.getEquityHistory(traderId),
     {
-      refreshInterval: 10000, // 每10秒刷新
+      refreshInterval: 30000, // 30秒刷新（历史数据更新频率较低）
+      revalidateOnFocus: false,
+      dedupingInterval: 20000,
     }
   );
 
@@ -42,7 +44,9 @@ export function EquityChart({ traderId }: EquityChartProps) {
     traderId ? `account-${traderId}` : 'account',
     () => api.getAccount(traderId),
     {
-      refreshInterval: 5000,
+      refreshInterval: 15000, // 15秒刷新（配合后端缓存）
+      revalidateOnFocus: false,
+      dedupingInterval: 10000,
     }
   );