diff --git a/pages/config/config.vue b/pages/config/config.vue
index 013d7cd..5a20a94 100644
--- a/pages/config/config.vue
+++ b/pages/config/config.vue
@@ -29,6 +29,17 @@
         </picker>
         <text class="helper-text" v-if="selectedStrategy">{{ selectedStrategy.desc }}</text>
       </view>
+
+      <view class="form-item">
+        <text class="label">组合币种</text>
+        <picker @change="onCurrencyChange" :value="currencyIndex" :range="currencyList" range-key="name">
+          <view class="picker-box">
+            <text class="picker-text">{{ currencyList[currencyIndex].name }}</text>
+            <uni-icons type="bottom" size="14" color="#9CA3AF"></uni-icons>
+          </view>
+        </picker>
+        <text class="helper-text">创建后币种不可修改，所有交易只能使用该币种</text>
+      </view>
     </view>
 
     <view class="section-card">
@@ -117,6 +128,13 @@ import { api } from '../../utils/api';
 
 const strategies = ref([]);
 const strategyIndex = ref(-1);
+// 币种选择
+const currencyList = ref([
+  { name: '人民币 CNY', code: 'CNY' },
+  { name: '美元 USD', code: 'USD' },
+  { name: '港币 HKD', code: 'HKD' }
+]);
+const currencyIndex = ref(0); // 默认CNY
 
 // 防止重复请求的标志
 let isFetching = false;
@@ -253,6 +271,10 @@ const onDateChange = (e, index) => {
   form.value.stocks[index].date = e.detail.value;
 };
 
+const onCurrencyChange = (e) => {
+  currencyIndex.value = e.detail.value;
+};
+
 const submitForm = async () => {
   if (!form.value.name) return uni.showToast({ title: '请输入组合名称', icon: 'none' });
   if (strategyIndex.value === -1) return uni.showToast({ title: '请选择策略', icon: 'none' });
@@ -294,17 +316,18 @@ const submitForm = async () => {
     }
   }
   
+  const selectedCurrency = currencyList.value[currencyIndex.value].code;
   const requestData = {
     name: form.value.name,
     strategyId: selected.id,
-    currency: 'USD',
+    currency: selectedCurrency,
     stocks: form.value.stocks.map(stock => ({
       name: stock.name,
       code: stock.name,
       price: parseFloat(stock.price) || 0,
       amount: parseFloat(stock.amount) || 0,
       date: stock.date,
-      currency: 'USD'
+      currency: selectedCurrency
     }))
   };
 
diff --git a/pages/detail/detail.vue b/pages/detail/detail.vue
index 07dda63..c91ccdf 100644
--- a/pages/detail/detail.vue
+++ b/pages/detail/detail.vue
@@ -16,7 +16,7 @@
         </view>
 
         <view class="card-main">
-          <text class="currency">¥</text>
+          <text class="currency">{{ getCurrencySymbol(portfolioData.currency) }}</text>
           <text class="big-number">{{ (portfolioData.portfolioValue || 0).toLocaleString('zh-CN', { minimumFractionDigits: 2, maximumFractionDigits: 2 }) }}</text>
         </view>
 
@@ -27,7 +27,7 @@
           </view>
           <view class="stat-item align-right">
             <text class="stat-label">日内波动</text>
-            <text class="stat-val" :class="(portfolioData.dailyVolatility || 0) >= 0 ? 'text-red' : 'text-green'">{{ (portfolioData.dailyVolatility || 0) >= 0 ? '+' : '' }}¥{{ (portfolioData.dailyVolatility || 0).toLocaleString('zh-CN', { minimumFractionDigits: 2, maximumFractionDigits: 2 }) }}</text>
+            <text class="stat-val" :class="(portfolioData.dailyVolatility || 0) >= 0 ? 'text-red' : 'text-green'">{{ (portfolioData.dailyVolatility || 0) >= 0 ? '+' : '' }}{{ getCurrencySymbol(portfolioData.currency) }}{{ (portfolioData.dailyVolatility || 0).toLocaleString('zh-CN', { minimumFractionDigits: 2, maximumFractionDigits: 2 }) }}</text>
           </view>
         </view>
       </view>
@@ -83,7 +83,7 @@
               </view>
             </view>
             <view class="flex-col align-right">
-              <text class="market-val">¥{{ (item.totalValue || 0).toLocaleString('zh-CN', { minimumFractionDigits: 2, maximumFractionDigits: 2 }) }}</text>
+              <text class="market-val">{{ getCurrencySymbol(portfolioData.currency) }}{{ (item.totalValue || 0).toLocaleString('zh-CN', { minimumFractionDigits: 2, maximumFractionDigits: 2 }) }}</text>
               <text class="weight-tag">比例 {{ (item.ratio || 0).toFixed(1) }}%</text>
             </view>
           </view>
@@ -94,7 +94,7 @@
             <view class="pnl-item">
               <text class="pnl-label">变动额</text>
               <text class="pnl-val" :class="(item.changeAmount || 0) >= 0 ? 'text-red' : 'text-green'">
-                {{ (item.changeAmount || 0) >= 0 ? '+' : '' }}¥{{ (item.changeAmount || 0).toLocaleString('zh-CN', { minimumFractionDigits: 2, maximumFractionDigits: 2 }) }}
+                {{ (item.changeAmount || 0) >= 0 ? '+' : '' }}{{ getCurrencySymbol(portfolioData.currency) }}{{ (item.changeAmount || 0).toLocaleString('zh-CN', { minimumFractionDigits: 2, maximumFractionDigits: 2 }) }}
               </text>
             </view>
             <view class="pnl-item align-right">
@@ -214,15 +214,7 @@
             />
           </view>
           
-          <view class="form-item">
-            <text class="form-label">货币</text>
-            <picker @change="onCurrencyChange" :value="currencyIndex" :range="currencyList" range-key="name">
-              <view class="form-select">
-                <text>{{ transactionForm.currency }}</text>
-                <uni-icons type="bottom" size="14" color="#9CA3AF"></uni-icons>
-              </view>
-            </picker>
-          </view>
+
           
           <view class="form-item">
             <text class="form-label">交易时间</text>
@@ -258,6 +250,16 @@
 import { ref, onMounted, watch } from 'vue';
 import { api } from '../../utils/api';
 
+// 获取货币符号
+const getCurrencySymbol = (currency) => {
+  const symbols = {
+    'CNY': '¥',
+    'USD': '$',
+    'HKD': 'HK$'
+  };
+  return symbols[currency] || '¥';
+};
+
 const portfolioId = ref('');
 const portfolioData = ref({
   id: '',
@@ -297,7 +299,7 @@ const transactionForm = ref({
   stockCode: '',
   amount: '',
   price: '',
-  currency: 'CNY',
+  currency: '', // 默认使用组合币种
   transactionDate: getCurrentDate(),
   remark: ''
 });
@@ -427,12 +429,16 @@ const goStrategyConfig = () => {
 const handleBuy = () => {
   transactionType.value = 'buy';
   resetTransactionForm();
+  // 默认使用组合币种
+  transactionForm.value.currency = portfolioData.value.currency;
   showTransactionForm.value = true;
 };
 
 const handleSell = () => {
   transactionType.value = 'sell';
   resetTransactionForm();
+  // 默认使用组合币种
+  transactionForm.value.currency = portfolioData.value.currency;
   // 卖出时自动填充持仓列表作为可选
   searchResults.value = positions.value.map(pos => ({
     ticker: pos.stockCode,