diff --git a/backend/config_manager.py b/backend/config_manager.py
index 788fab2..8ef3206 100644
--- a/backend/config_manager.py
+++ b/backend/config_manager.py
@@ -827,9 +827,9 @@ class ConfigManager:
             
             # 市场扫描（30分钟主周期）
             'SCAN_INTERVAL': eff_get('SCAN_INTERVAL', scan_interval_default),  # 30分钟（增加交易机会）
-            'TOP_N_SYMBOLS': eff_get('TOP_N_SYMBOLS', 8),  # 每次扫描后优先处理的交易对数量
-            'SCAN_EXTRA_SYMBOLS_FOR_SUPPLEMENT': eff_get('SCAN_EXTRA_SYMBOLS_FOR_SUPPLEMENT', 8),  # 智能补单：多返回的候选数量，冷却时仍可尝试后续交易对
-            'MAX_SCAN_SYMBOLS': eff_get('MAX_SCAN_SYMBOLS', 250),  # 扫描的最大交易对数量（增加到250，提升覆盖率到46%）
+            'TOP_N_SYMBOLS': eff_get('TOP_N_SYMBOLS', 20),  # 每次扫描后优先处理的交易对数量
+            'SCAN_EXTRA_SYMBOLS_FOR_SUPPLEMENT': eff_get('SCAN_EXTRA_SYMBOLS_FOR_SUPPLEMENT', 15),  # 智能补单：多返回的候选数量，冷却时仍可尝试后续交易对
+            'MAX_SCAN_SYMBOLS': eff_get('MAX_SCAN_SYMBOLS', 500),  # 扫描的最大交易对数量（增加到500）
             'EXCLUDE_MAJOR_COINS': eff_get('EXCLUDE_MAJOR_COINS', True),  # 是否排除主流币（BTC、ETH、BNB等），专注于山寨币
             'KLINE_INTERVAL': eff_get('KLINE_INTERVAL', '1h'),
             'PRIMARY_INTERVAL': eff_get('PRIMARY_INTERVAL', '1h'),
diff --git a/frontend/src/components/ConfigGuide.jsx b/frontend/src/components/ConfigGuide.jsx
index c4a20fb..d8c93f2 100644
--- a/frontend/src/components/ConfigGuide.jsx
+++ b/frontend/src/components/ConfigGuide.jsx
@@ -28,7 +28,7 @@ const ConfigGuide = () => {
                 <li><strong>💎 流动性筛选</strong>: 24H成交额≥3000万美元，波动率≥3%</li>
                 <li><strong>🎲 固定风险</strong>: 每笔最多亏1%，单笔1.5%仓位</li>
                 <li><strong>⏰ 持仓锁</strong>: 0秒（取消，山寨币变化快）</li>
-                <li><strong>📊 交易频率</strong>: 每小时扫描，每日最多5笔，只做最强5个</li>
+                <li><strong>📊 交易频率</strong>: 每小时扫描，每日最多5笔，候选池扩大至20个（捕获更多机会）</li>
               </ul>
             </div>
             <div className="preset-effect">
diff --git a/frontend/src/components/ConfigPanel.jsx b/frontend/src/components/ConfigPanel.jsx
index 7705443..563da7b 100644
--- a/frontend/src/components/ConfigPanel.jsx
+++ b/frontend/src/components/ConfigPanel.jsx
@@ -71,9 +71,10 @@ const ConfigPanel = () => {
         USE_FIXED_RISK_SIZING: true, FIXED_RISK_PERCENT: 1.0,
         USE_TRAILING_STOP: true, TRAILING_STOP_ACTIVATION: 20.0, TRAILING_STOP_PROTECT: 10.0,
         MAX_POSITION_PERCENT: 1.5, MAX_TOTAL_POSITION_PERCENT: 12.0, MAX_DAILY_ENTRIES: 8,
-        MIN_VOLUME_24H: 30000000, MIN_VOLATILITY: 3.0, TOP_N_SYMBOLS: 8, MIN_SIGNAL_STRENGTH: 5,
-        MAX_SCAN_SYMBOLS: 250, SCAN_INTERVAL: 1800, SMART_ENTRY_ENABLED: true, AUTO_TRADE_ONLY_TRENDING: true,
+        MIN_VOLUME_24H: 30000000, MIN_VOLATILITY: 3.0, TOP_N_SYMBOLS: 20, MIN_SIGNAL_STRENGTH: 5,
+        MAX_SCAN_SYMBOLS: 500, SCAN_INTERVAL: 1800, SMART_ENTRY_ENABLED: true, AUTO_TRADE_ONLY_TRENDING: true,
         AUTO_TRADE_ALLOW_4H_NEUTRAL: true, EXCLUDE_MAJOR_COINS: true,
+        SCAN_EXTRA_SYMBOLS_FOR_SUPPLEMENT: 15,
       },
     },
     swing: {
@@ -82,7 +83,7 @@ const ConfigPanel = () => {
       configs: {
         // 操作频率
         SCAN_INTERVAL: 1800, // 30分钟
-        TOP_N_SYMBOLS: 8,
+        TOP_N_SYMBOLS: 20,
 
         // 仓位管理（重要语义：这些百分比均按“保证金占用比例”理解）
         MAX_POSITION_PERCENT: 2.0, // 2%