diff --git a/bklog/web/src/global/bk-space-choice/index.tsx b/bklog/web/src/global/bk-space-choice/index.tsx
index f3542bd1071..149d521a8f0 100644
--- a/bklog/web/src/global/bk-space-choice/index.tsx
+++ b/bklog/web/src/global/bk-space-choice/index.tsx
@@ -25,8 +25,10 @@
  */
 import { defineComponent, ref, computed, watch, nextTick, onUnmounted } from 'vue';
 
+import $http from '@/api';
 import useLocale from '@/hooks/use-locale';
 import { useNavMenu } from '@/hooks/use-nav-menu';
+import { getAllSpaceList } from '@/preload';
 import { SPACE_TYPE_MAP } from '@/store/constant';
 import { BK_LOG_STORAGE } from '@/store/store.type';
 import { debounce } from 'throttle-debounce';
@@ -76,6 +78,8 @@ export default defineComponent({
     const refRootElement = ref<HTMLElement>(null);
 
     const isExternal = computed(() => store.state.isExternal);
+    // 首屏只加载当前空间，全量空间列表由 getAllSpaceList 异步补齐
+    const spaceListLoading = computed(() => !store.state.spaceListLoaded);
     const demoUid = computed(() => store.getters.demoUid);
     const demoSpace = computed(() => mySpaceList.value.find(item => item.space_uid === demoUid.value));
 
@@ -361,6 +365,9 @@ export default defineComponent({
     // 点击业务名称时触发，切换下拉框显示并聚焦搜索框
     const handleClickBizSelect = () => {
       showBizList.value = !showBizList.value;
+      if (showBizList.value && spaceListLoading.value) {
+        getAllSpaceList($http, store);
+      }
       setTimeout(() => {
         menuSearchInput.value?.focus();
       }, 100);
@@ -529,6 +536,7 @@ export default defineComponent({
                 checked={spaceUid.value}
                 commonList={commonList.value}
                 list={groupList.value}
+                loading={spaceListLoading.value}
                 theme={props.theme as ThemeType}
                 selectedIndex={selectedIndex.value}
                 selectableItems={selectableItems.value}
diff --git a/bklog/web/src/global/bk-space-choice/list.scss b/bklog/web/src/global/bk-space-choice/list.scss
index ac3fdc6a956..e49eb260012 100644
--- a/bklog/web/src/global/bk-space-choice/list.scss
+++ b/bklog/web/src/global/bk-space-choice/list.scss
@@ -32,6 +32,40 @@
     padding-bottom: 24px;
   }
 
+  .list-skeleton {
+    height: 240px;
+    overflow: hidden;
+  }
+
+  .list-skeleton-item {
+    display: flex;
+    align-items: center;
+    height: 32px;
+    padding: 0 12px;
+
+    &:nth-child(3n) .list-skeleton-bar {
+      width: 55%;
+    }
+
+    &:nth-child(3n + 2) .list-skeleton-bar {
+      width: 70%;
+    }
+  }
+
+  .list-skeleton-bar {
+    width: 85%;
+    height: 12px;
+    background: linear-gradient(90deg, #eef0f4 25%, #f7f8fa 37%, #eef0f4 63%);
+    background-size: 400% 100%;
+    border-radius: 2px;
+    animation: bklog-space-skeleton-loading 1.4s ease infinite;
+  }
+
+  &.dark .list-skeleton-bar {
+    background: linear-gradient(90deg, #242c40 25%, #2c354d 37%, #242c40 63%);
+    background-size: 400% 100%;
+  }
+
   .list-group {
     position: relative;
 
@@ -218,6 +252,16 @@
   }
 }
 
+@keyframes bklog-space-skeleton-loading {
+  0% {
+    background-position: 100% 50%;
+  }
+
+  100% {
+    background-position: 0 50%;
+  }
+}
+
 // 设置默认弹窗
 .confirm-dialog__set-default {
   .bk-dialog-body {
diff --git a/bklog/web/src/global/bk-space-choice/list.tsx b/bklog/web/src/global/bk-space-choice/list.tsx
index 4e34f91a1ff..d9d9b116bfa 100644
--- a/bklog/web/src/global/bk-space-choice/list.tsx
+++ b/bklog/web/src/global/bk-space-choice/list.tsx
@@ -67,6 +67,9 @@ export interface IListItem {
 
 export type ThemeType = 'dark' | 'light';
 
+// 骨架屏行数，按列表可视高度 240px / 行高 32px 铺满
+const SKELETON_ROW_COUNT = 7;
+
 // const DEFAULT_BIZ_ID = 'DEFAULT_BIZ_ID';
 
 export default defineComponent({
@@ -102,6 +105,10 @@ export default defineComponent({
       type: Array as () => IListItem[],
       default: () => [],
     },
+    loading: {
+      type: Boolean,
+      default: false,
+    },
   },
   emits: ['handleClickOutSide', 'handleClickMenuItem', 'openDialog'],
   setup(props, { emit }) {
@@ -139,10 +146,26 @@ export default defineComponent({
       return selectableIndex === props.selectedIndex;
     };
 
+    // 空间列表加载中的骨架占位，避免只渲染首屏预加载的单个空间造成误解
+    const renderSkeleton = () => (
+      <div class='list-skeleton'>
+        {Array.from({ length: SKELETON_ROW_COUNT }).map((_, index) => (
+          <div
+            key={index}
+            class='list-skeleton-item'
+          >
+            <span class='list-skeleton-bar' />
+          </div>
+        ))}
+      </div>
+    );
+
     // 渲染函数
     return () => (
       <div class={['biz-list-wrap', props.theme]}>
-        {props.list.length > 0 ? (
+        {props.loading ? (
+          renderSkeleton()
+        ) : props.list.length > 0 ? (
           // 滚动加载
           <RecycleScroller
             class={['list-scroller']}
diff --git a/bklog/web/src/preload.ts b/bklog/web/src/preload.ts
index e4d50f5599b..0d35bc959df 100644
--- a/bklog/web/src/preload.ts
+++ b/bklog/web/src/preload.ts
@@ -48,33 +48,50 @@ export const getExternalMenuListBySpace = (space) => {
   return list;
 };
 
+let allSpaceListPromise: Promise<void> | null = null;
+
 /**
  * 获取所有空间列表
+ * 多处调用共享同一次请求，避免首屏与下拉打开时重复拉取
  * @param http
  * @param store
  * @returns
  */
-export const getAllSpaceList = (http, store) => {
-  window.scheduler.postTask(() => {
-    http
-      .request('space/getMySpaceList')
-      .then((resp) => {
-        const spaceList = resp.data;
-        spaceList.forEach((item) => {
-          item.bk_biz_id = `${item.bk_biz_id}`;
-          item.space_uid = `${item.space_uid}`;
-          item.space_full_code_name = `${item.space_name}(#${item.space_id})`;
-        });
+export const getAllSpaceList = (http, store): Promise<void> => {
+  if (store.state.spaceListLoaded) {
+    return Promise.resolve();
+  }
 
-        store.commit('updateMySpaceList', spaceList);
-        store.commit(SET_APP_STATE, { spaceListLoaded: true });
-      })
-      .catch((e) => {
-        store.commit('updateMySpaceList', []);
-        store.commit(SET_APP_STATE, { spaceListLoaded: true });
-        console.error('获取空间列表失败', e);
-      });
+  if (allSpaceListPromise) {
+    return allSpaceListPromise;
+  }
+
+  allSpaceListPromise = new Promise<void>((resolve) => {
+    window.scheduler.postTask(() => {
+      http
+        .request('space/getMySpaceList')
+        .then((resp) => {
+          const spaceList = Array.isArray(resp?.data) ? resp.data : [];
+          spaceList.forEach((item) => {
+            item.bk_biz_id = `${item.bk_biz_id}`;
+            item.space_uid = `${item.space_uid}`;
+            item.space_full_code_name = `${item.space_name}(#${item.space_id})`;
+          });
+
+          store.commit('updateMySpaceList', spaceList);
+        })
+        .catch((e) => {
+          // 保留首屏已解析出的当前空间，避免请求失败时业务名与下拉列表一起被清空
+          console.error('获取空间列表失败', e);
+        })
+        .finally(() => {
+          store.commit(SET_APP_STATE, { spaceListLoaded: true });
+          resolve();
+        });
+    });
   });
+
+  return allSpaceListPromise;
 };
 
 /**