diff --git a/README.md b/README.md
index 8a0c657..fa686cf 100644
--- a/README.md
+++ b/README.md
@@ -7,9 +7,10 @@
 ### [preview](https://jiangteng2019.github.io/satellite-track/)
 
 
-1. In order to save performance, the satellite orbit data is displayed by clicking.
-1. Data from celestrak.
-1. The access speed of github pages is slow, and the TLE data and cesium data are large. Please wait patiently for the resources to load.
+1. In order to save performance, satellite-track uses the following restrictions: click display of satellite orbital data, not full display, orbital data prediction for the next 24 hours, and only five constellation data can be selected at the same time;
+1. Data from celestrak;
+1. The access speed of github pages is slow, and the TLE data and cesium data are large. Please wait patiently for the resources to load;
+1. If the spacecraft changes orbit frequently, the TLE cache needs to be cleared manually before use;
 
 -------------------------------------------
 
@@ -20,9 +21,10 @@
 ### [预览](https://jiangteng2019.github.io/satellite-track/)
 
 
-1. 为了节约性能，卫星轨道数据点击显示，而非全量显示;
+1. 为了节约性能，satellite-track 使用了如下限制：卫星轨道数据点击显示，而非全量显示、轨道数据预测未来24小时、只能同时选择5个星座数据;
 1. 数据来源于celestrak;
 1. github pages 访问速度慢，TLE数据与cesium数据较大，请耐心等待资源加载;
+1. 如果航天器变轨频繁，使用前需手动清除TLE缓存;
 
 
 [![satellite-track](https://images.cnblogs.com/cnblogs_com/engeng/2270012/o_230203011203_1.jpg "satellite-track")](https://images.cnblogs.com/cnblogs_com/engeng/2270012/o_230203011203_1.jpg "satellite-track")
diff --git a/src/views/satellite-track/SatelliteTrack.vue b/src/views/satellite-track/SatelliteTrack.vue
index 3a055d8..a0c0683 100644
--- a/src/views/satellite-track/SatelliteTrack.vue
+++ b/src/views/satellite-track/SatelliteTrack.vue
@@ -13,6 +13,15 @@
                 <el-checkbox v-if="!item.type" :label="item.value">{{ item.label }}</el-checkbox>
             </template>
         </el-checkbox-group>
+        <el-row style="padding: 30px 0px;">
+            <el-button type="primary" @click="clearTLECache">
+                清除TLE缓存
+            </el-button>
+
+            <el-button type="primary" @click="clearSatelliteOrbit">
+                清除轨道
+            </el-button>
+        </el-row>
     </el-drawer>
 </template>
 
@@ -31,7 +40,6 @@ import { getTleDataFromExternal } from '@/http/index'
 import SatelliteEntity from '@/js/SatelliteEntity';
 
 import { specialSatellite, weatherSatellite, communicationSatellite, navigationSatellite, scientificSatellite, miscellaneousSatellite } from "./satelliteType"
-import { add } from 'lodash';
 
 let allSatellite = [...specialSatellite, ...weatherSatellite, ...communicationSatellite, ...navigationSatellite, ...scientificSatellite, ...miscellaneousSatellite];
 
@@ -46,7 +54,7 @@ const satelliteMap = new Map();
 // 响应式数据
 const drawer = ref(false);
 
-const checked = ref([]);
+const checked = ref([1]);
 
 const clickedSatelliteArray = [];
 
@@ -129,10 +137,7 @@ function addCesiumEventListener() {
         const pickedFeature = viewer.scene.pick(movement.position);
         console.log(pickedFeature);
         if (!Cesium.defined(pickedFeature)) {
-            clickedSatelliteArray.forEach(item => {
-                item.id.path.show = false;
-            })
-            return;
+
         }
         if (pickedFeature) {
             pickedFeature.id.path.show = new Cesium.ConstantProperty(true);
@@ -148,6 +153,19 @@ function handleSatelliteChange(e) {
 
 }
 
+function clearTLECache() {
+    localStorage.clear();
+    ElMessage.success('清除成功')
+}
+
+function clearSatelliteOrbit() {
+    if (clickedSatelliteArray.length) {
+        clickedSatelliteArray.forEach(item => {
+            item.id ? item.id.path.show = false : '';
+        })
+    }
+}
+
 
 // 获取tle数据，从缓存中获取，若无请求数据
 
@@ -209,6 +227,7 @@ onMounted(async () => {
     initCesium();
     initTimeLine();
     addCesiumEventListener();
+    addSatellite('last-30-days');
 })