diff --git a/YLErpWeb/Views/Pricing/Structure_DZ.cshtml b/YLErpWeb/Views/Pricing/Structure_DZ.cshtml
index 236f4f8c..18c7d47e 100644
--- a/YLErpWeb/Views/Pricing/Structure_DZ.cshtml
+++ b/YLErpWeb/Views/Pricing/Structure_DZ.cshtml
@@ -85,7 +85,7 @@
     <script src="~/Statics/libs/sortable/Sortable.min.js"></script>
     <script src="~/front/calendar?v=@(HtmlUtil.JsVersion)"></script>
     <script src="~/Scripts/app/tradeHelper.js?v=@HtmlUtil.JsVersion"></script>
-    <script src="@HtmlUtil.BasicDataJs("品种", "标的Live", "客户")"></script>
+    <script src="@HtmlUtil.BasicDataJs("品种", "客户")"></script>
     <script>
         const pageObj = @Json.Serialize(pageObj);
         const pageData = @Json.Serialize(pageData);
diff --git a/YLErpWeb/Views/Pricing/structure.cshtml b/YLErpWeb/Views/Pricing/structure.cshtml
index 8a3478c3..9850abc4 100644
--- a/YLErpWeb/Views/Pricing/structure.cshtml
+++ b/YLErpWeb/Views/Pricing/structure.cshtml
@@ -77,7 +77,7 @@
     <script src="~/Statics/libs/sortable/Sortable.min.js"></script>
     <script src="~/front/calendar?v=@(HtmlUtil.JsVersion)"></script>
     <script src="~/Scripts/app/tradeHelper.js?v=@HtmlUtil.JsVersion"></script>
-    <script src="@HtmlUtil.BasicDataJs("品种", "标的Live", "客户")"></script>
+    <script src="@HtmlUtil.BasicDataJs("品种", "客户")"></script>
     <script src="~/Scripts/app/trade/settag.js?v=@HtmlUtil.JsVersion" type="text/javascript"></script>
     <script type="text/javascript">
         const HasEditTagPermission = @Json.Serialize(CurUser.系统管理.标签编辑权限);
diff --git a/YLErpWeb/wwwroot/Scripts/app/pricing/structure.js b/YLErpWeb/wwwroot/Scripts/app/pricing/structure.js
index 5652bb7f..fbd8e5df 100644
--- a/YLErpWeb/wwwroot/Scripts/app/pricing/structure.js
+++ b/YLErpWeb/wwwroot/Scripts/app/pricing/structure.js
@@ -109,9 +109,52 @@ const vueTradeType = function () {
     };
 };
 
-//标的选择组件
+//标的选择组件（EQD-7049：改为服务端搜索，不再依赖全量 ylotc.underlyings，避免十几万标的整段下载卡死）
 const vueUnderlying = function () {
     const _suggestionTpl = _.template($('#underlyingSuggestionTpl').html());
+    // 标的缓存：按 品种|关键词 隔离；乱序响应由 token 丢弃（helper 收在函数内，避免全局绑定冲突）
+    const _cache = {};
+    const _tokens = {};
+    function _fetch(varietyId, query, cb) {
+        var key = (varietyId || 0) + '|' + (query || '');
+        var token = (_tokens[key] = (_tokens[key] || 0) + 1);
+        var postData = {
+            FilterCode: (query || '').toUpperCase(),
+            VarietyId: varietyId || 0,
+            MaxShowLength: 20,
+            BlackLimit: 1,
+            UseForTrading: true,
+            IncludeMatured: true,
+            CheckLaunch: true
+        };
+        main.post('/frontdata/AjaxGetUnderlyingSelect', postData).done(function (res) {
+            if (_tokens[key] !== token) return; // 丢弃过期响应
+            var arr = (res && (res.obj || res.data)) || [];
+            var norm = arr.map(function (x) {
+                return {
+                    Code: x.Code,
+                    Name: x.Name,
+                    InstrumentType: x.InstrumentType,
+                    VarietyId: x.VarietyId,
+                    Disallow: !!x.Disallow,
+                    IsCombined: !!x.IsSynthetic || !!x.IsBasket,
+                    BlackWhiteState: x.BlackWhiteState || 0,
+                    PinYin: x.PinYin || ''
+                };
+            });
+            cb && cb(norm);
+        });
+    }
+    function _filter(list, query, varietyId) {
+        if (!query) return (list || []).slice(0, 20);
+        query = query.toUpperCase();
+        return (list || []).filter(function (x) {
+            if (varietyId && x.VarietyId !== varietyId) return false;
+            if (x.IsCombined) return false; // 与原逻辑一致：搜索时排除组合标的
+            return (x.Code && x.Code.toUpperCase().indexOf(query) !== -1)
+                || (x.PinYin && x.PinYin.toUpperCase().indexOf(query) !== -1);
+        }).slice(0, 20);
+    }
     return {
         props: ['underlying'],
         data() {
@@ -120,27 +163,24 @@ const vueUnderlying = function () {
         mounted() {
             var self = this;
             this.jqInput = $(this.$el).children(0);
+            // EQD-7049：预拉默认20条（当前品种），避免下拉空白
+            _fetch(self.underlying.VarietyId, '', function (list) {
+                _cache[self.underlying.VarietyId || 0] = list;
+                try { $(self.jqInput).autocomplete('search', ''); } catch (e) {}
+            });
             this.autoctrl = FastVue.autocomplete(this.jqInput, {
                 valueField: 'Code',
                 lookup(query, callback) {
-                    var arr = [];
-                    if (!query) {
-                        var varietyId = self.underlying.VarietyId;
-                        ylotc.underlyings.forEach(x => {
-                            (!varietyId || x.VarietyId === varietyId) && arr.push(x);
-                        });
-                    } else {
-                        query = query.toUpperCase();
-                        ylotc.underlyings.forEach(x => {
-                            if (x.Code.toUpperCase().indexOf(query) !== -1 || x.PinYin && x.PinYin.indexOf(query) !== -1 && !x.IsCombined) {
-                                arr.push(x);
-                            }
+                    var varietyId = self.underlying.VarietyId;
+                    var cached = _cache[varietyId || 0] || [];
+                    var immediate = _filter(cached, query, varietyId);
+                    if (query) {
+                        // 有输入时异步向服务端搜索并刷新缓存（乱序响应由 token 丢弃）
+                        _fetch(varietyId, query, function (list) {
+                            _cache[varietyId || 0] = list;
                         });
                     }
-                    if (arr.length < 30) {
-                        arr = _.sortBy(arr, x => x.Code);
-                    }
-                    return arr;
+                    return immediate;
                 },
                 onSelect(data) {
                     if (self.underlying !== data) {
diff --git a/YLErpWeb/wwwroot/Scripts/app/pricing/structure_dz.js b/YLErpWeb/wwwroot/Scripts/app/pricing/structure_dz.js
index 4cf2f0fc..39b10060 100644
--- a/YLErpWeb/wwwroot/Scripts/app/pricing/structure_dz.js
+++ b/YLErpWeb/wwwroot/Scripts/app/pricing/structure_dz.js
@@ -108,9 +108,52 @@ const vueTradeType = function () {
     };
 };
 
-//标的选择组件
+//标的选择组件（EQD-7049：改为服务端搜索，不再依赖全量 ylotc.underlyings，避免十几万标的整段下载卡死）
 const vueUnderlying = function () {
     const _suggestionTpl = _.template($('#underlyingSuggestionTpl').html());
+    // 标的缓存：按 品种|关键词 隔离；乱序响应由 token 丢弃（helper 收在函数内，避免全局绑定冲突）
+    const _cache = {};
+    const _tokens = {};
+    function _fetch(varietyId, query, cb) {
+        var key = (varietyId || 0) + '|' + (query || '');
+        var token = (_tokens[key] = (_tokens[key] || 0) + 1);
+        var postData = {
+            FilterCode: (query || '').toUpperCase(),
+            VarietyId: varietyId || 0,
+            MaxShowLength: 20,
+            BlackLimit: 1,
+            UseForTrading: true,
+            IncludeMatured: true,
+            CheckLaunch: true
+        };
+        main.post('/frontdata/AjaxGetUnderlyingSelect', postData).done(function (res) {
+            if (_tokens[key] !== token) return; // 丢弃过期响应
+            var arr = (res && (res.obj || res.data)) || [];
+            var norm = arr.map(function (x) {
+                return {
+                    Code: x.Code,
+                    Name: x.Name,
+                    InstrumentType: x.InstrumentType,
+                    VarietyId: x.VarietyId,
+                    Disallow: !!x.Disallow,
+                    IsCombined: !!x.IsSynthetic || !!x.IsBasket,
+                    BlackWhiteState: x.BlackWhiteState || 0,
+                    PinYin: x.PinYin || ''
+                };
+            });
+            cb && cb(norm);
+        });
+    }
+    function _filter(list, query, varietyId) {
+        if (!query) return (list || []).slice(0, 20);
+        query = query.toUpperCase();
+        return (list || []).filter(function (x) {
+            if (varietyId && x.VarietyId !== varietyId) return false;
+            if (x.IsCombined) return false; // 与原逻辑一致：搜索时排除组合标的
+            return (x.Code && x.Code.toUpperCase().indexOf(query) !== -1)
+                || (x.PinYin && x.PinYin.toUpperCase().indexOf(query) !== -1);
+        }).slice(0, 20);
+    }
     return {
         props: ['underlying'],
         data() {
@@ -119,27 +162,24 @@ const vueUnderlying = function () {
         mounted() {
             var self = this;
             this.jqInput = $(this.$el).children(0);
+            // EQD-7049：预拉默认20条（当前品种），避免下拉空白
+            _fetch(self.underlying.VarietyId, '', function (list) {
+                _cache[self.underlying.VarietyId || 0] = list;
+                try { $(self.jqInput).autocomplete('search', ''); } catch (e) {}
+            });
             this.autoctrl = FastVue.autocomplete(this.jqInput, {
                 valueField: 'Code',
                 lookup(query, callback) {
-                    var arr = [];
-                    if (!query) {
-                        var varietyId = self.underlying.VarietyId;
-                        ylotc.underlyings.forEach(x => {
-                            (!varietyId || x.VarietyId === varietyId) && arr.push(x);
-                        });
-                    } else {
-                        query = query.toUpperCase();
-                        ylotc.underlyings.forEach(x => {
-                            if (x.Code.toUpperCase().indexOf(query) !== -1 || x.PinYin && x.PinYin.indexOf(query) !== -1 && !x.IsCombined) {
-                                arr.push(x);
-                            }
+                    var varietyId = self.underlying.VarietyId;
+                    var cached = _cache[varietyId || 0] || [];
+                    var immediate = _filter(cached, query, varietyId);
+                    if (query) {
+                        // 有输入时异步向服务端搜索并刷新缓存（乱序响应由 token 丢弃）
+                        _fetch(varietyId, query, function (list) {
+                            _cache[varietyId || 0] = list;
                         });
                     }
-                    if (arr.length < 30) {
-                        arr = _.sortBy(arr, x => x.Code);
-                    }
-                    return arr;
+                    return immediate;
                 },
                 onSelect(data) {
                     if (self.underlying !== data) {