diff --git a/pages/detail/detail.vue b/pages/detail/detail.vue
index 8a6ac10..c302889 100644
--- a/pages/detail/detail.vue
+++ b/pages/detail/detail.vue
@@ -164,7 +164,9 @@
               v-model="transactionForm.stockCode" 
               class="form-input" 
               :placeholder="transactionType === 'sell' ? '请选择要卖出的持仓' : '请输入股票代码'"
-              @input="(e) => searchStock(e.detail.value)"
+              :readonly="transactionType === 'sell'"
+              @input="transactionType === 'buy' ? searchStock(e.detail.value) : () => {}"
+              @click="transactionType === 'sell' && searchResults.length > 0 ? () => {} : () => {}"
             />
             <!-- 搜索下拉列表/持仓列表 -->
             <view class="search-dropdown" v-if="searchResults.length > 0">