diff --git a/app/src/main/kotlin/li/songe/gkd/MainViewModel.kt b/app/src/main/kotlin/li/songe/gkd/MainViewModel.kt
index e564fbac7..d86ec3b51 100644
--- a/app/src/main/kotlin/li/songe/gkd/MainViewModel.kt
+++ b/app/src/main/kotlin/li/songe/gkd/MainViewModel.kt
@@ -3,7 +3,7 @@ package li.songe.gkd
 import androidx.lifecycle.ViewModel
 import androidx.lifecycle.viewModelScope
 import kotlinx.coroutines.Dispatchers
-import kotlinx.coroutines.flow.debounce
+import kotlinx.coroutines.flow.first
 import kotlinx.coroutines.launch
 import li.songe.gkd.data.RawSubscription
 import li.songe.gkd.data.SubsItem
@@ -17,8 +17,6 @@ import li.songe.gkd.util.logZipDir
 import li.songe.gkd.util.newVersionApkDir
 import li.songe.gkd.util.snapshotZipDir
 import li.songe.gkd.util.storeFlow
-import li.songe.gkd.util.subsIdToRawFlow
-import li.songe.gkd.util.subsItemsFlow
 import li.songe.gkd.util.updateSubscription
 
 class MainViewModel : ViewModel() {
@@ -34,23 +32,16 @@ class MainViewModel : ViewModel() {
             id = -2, order = -2, mtime = System.currentTimeMillis()
         )
         viewModelScope.launchTry(Dispatchers.IO) {
-            subsItemsFlow.debounce(1000).collect { subsItems ->
-                if (!subsItems.any { s -> s.id == localSubsItem.id }) {
-                    DbSet.subsItemDao.insert(localSubsItem)
-                }
-            }
-        }
-        viewModelScope.launchTry(Dispatchers.IO) {
-            subsIdToRawFlow.debounce(1000).collect { subsIdToRaw ->
-                if (!subsIdToRaw.containsKey(localSubsItem.id)) {
-                    updateSubscription(
-                        RawSubscription(
-                            id = localSubsItem.id,
-                            name = "本地订阅",
-                            version = 0
-                        )
+            val subsItems = DbSet.subsItemDao.query().first()
+            if (!subsItems.any { s -> s.id == localSubsItem.id }) {
+                updateSubscription(
+                    RawSubscription(
+                        id = localSubsItem.id,
+                        name = "本地订阅",
+                        version = 0
                     )
-                }
+                )
+                DbSet.subsItemDao.insert(localSubsItem)
             }
         }
 
diff --git a/app/src/main/kotlin/li/songe/gkd/service/GkdAbService.kt b/app/src/main/kotlin/li/songe/gkd/service/GkdAbService.kt
index 39823e226..825fd1705 100644
--- a/app/src/main/kotlin/li/songe/gkd/service/GkdAbService.kt
+++ b/app/src/main/kotlin/li/songe/gkd/service/GkdAbService.kt
@@ -17,9 +17,6 @@ import android.view.accessibility.AccessibilityEvent
 import android.view.accessibility.AccessibilityNodeInfo
 import com.blankj.utilcode.util.LogUtils
 import com.blankj.utilcode.util.ScreenUtils
-import io.ktor.client.call.body
-import io.ktor.client.request.get
-import io.ktor.client.statement.bodyAsText
 import kotlinx.coroutines.Dispatchers
 import kotlinx.coroutines.ExperimentalCoroutinesApi
 import kotlinx.coroutines.FlowPreview
@@ -39,25 +36,19 @@ import li.songe.gkd.data.ActionResult
 import li.songe.gkd.data.AppRule
 import li.songe.gkd.data.AttrInfo
 import li.songe.gkd.data.GkdAction
-import li.songe.gkd.data.RawSubscription
 import li.songe.gkd.data.RpcError
 import li.songe.gkd.data.RuleStatus
-import li.songe.gkd.data.SubsVersion
 import li.songe.gkd.data.getActionFc
-import li.songe.gkd.db.DbSet
 import li.songe.gkd.debug.SnapshotExt
 import li.songe.gkd.shizuku.shizukuIsSafeOK
 import li.songe.gkd.shizuku.useSafeGetTasksFc
 import li.songe.gkd.shizuku.useShizukuAliveState
 import li.songe.gkd.util.VOLUME_CHANGED_ACTION
-import li.songe.gkd.util.client
+import li.songe.gkd.util.checkSubsUpdate
 import li.songe.gkd.util.launchTry
 import li.songe.gkd.util.map
 import li.songe.gkd.util.storeFlow
-import li.songe.gkd.util.subsIdToRawFlow
-import li.songe.gkd.util.subsItemsFlow
 import li.songe.gkd.util.toast
-import li.songe.gkd.util.updateSubscription
 import li.songe.selector.Selector
 import java.util.concurrent.ExecutorService
 import java.util.concurrent.Executors
@@ -325,46 +316,6 @@ class GkdAbService : CompositionAbService({
         }
     }
 
-    fun checkSubsUpdate() = scope.launchTry(Dispatchers.IO) { // 自动从网络更新订阅文件
-        LogUtils.d("开始自动检测更新")
-        subsItemsFlow.value.forEach { subsItem ->
-            if (subsItem.updateUrl == null) return@forEach
-            try {
-                val oldSubsRaw = subsIdToRawFlow.value[subsItem.id]
-                if (oldSubsRaw?.checkUpdateUrl != null) {
-                    try {
-                        val subsVersion =
-                            client.get(oldSubsRaw.checkUpdateUrl).body<SubsVersion>()
-                        LogUtils.d("快速检测更新成功", subsVersion)
-                        if (subsVersion.id == oldSubsRaw.id && subsVersion.version <= oldSubsRaw.version) {
-                            return@forEach
-                        }
-                    } catch (e: Exception) {
-                        LogUtils.d("快速检测更新失败", subsItem, e)
-                    }
-                }
-                val newSubsRaw = RawSubscription.parse(
-                    client.get(oldSubsRaw?.updateUrl ?: subsItem.updateUrl).bodyAsText()
-                )
-                if (newSubsRaw.id != subsItem.id) {
-                    return@forEach
-                }
-                if (oldSubsRaw != null && newSubsRaw.version <= oldSubsRaw.version) {
-                    return@forEach
-                }
-                updateSubscription(newSubsRaw)
-                val newItem = subsItem.copy(
-                    mtime = System.currentTimeMillis()
-                )
-                DbSet.subsItemDao.update(newItem)
-                LogUtils.d("更新订阅文件:${newSubsRaw.name}")
-            } catch (e: Exception) {
-                e.printStackTrace()
-                LogUtils.d("检测更新失败", e)
-            }
-        }
-    }
-
     var lastUpdateSubsTime = 0L
     onAccessibilityEvent {// 借助 无障碍事件 触发自动检测更新
         if (it.eventType == AccessibilityEvent.TYPE_WINDOW_STATE_CHANGED) {// 筛选降低判断频率
diff --git a/app/src/main/kotlin/li/songe/gkd/ui/home/HomeVm.kt b/app/src/main/kotlin/li/songe/gkd/ui/home/HomeVm.kt
index 2c760cfab..e25a49ba7 100644
--- a/app/src/main/kotlin/li/songe/gkd/ui/home/HomeVm.kt
+++ b/app/src/main/kotlin/li/songe/gkd/ui/home/HomeVm.kt
@@ -171,7 +171,7 @@ class HomeVm @Inject constructor() : ViewModel() {
         var errorNum = 0
         val oldSubItems = subsItemsFlow.value
         val newSubsItems = oldSubItems.mapNotNull { oldItem ->
-            if (oldItem.updateUrl == null) return@mapNotNull null
+            if (oldItem.updateUrl == null || oldItem.id < 0) return@mapNotNull null
             val oldSubsRaw = subsIdToRawFlow.value[oldItem.id]
             try {
                 if (oldSubsRaw?.checkUpdateUrl != null) {
diff --git a/app/src/main/kotlin/li/songe/gkd/util/SubsState.kt b/app/src/main/kotlin/li/songe/gkd/util/SubsState.kt
index 71181890f..4e4bcfb29 100644
--- a/app/src/main/kotlin/li/songe/gkd/util/SubsState.kt
+++ b/app/src/main/kotlin/li/songe/gkd/util/SubsState.kt
@@ -1,6 +1,9 @@
 package li.songe.gkd.util
 
 import com.blankj.utilcode.util.LogUtils
+import io.ktor.client.call.body
+import io.ktor.client.request.get
+import io.ktor.client.statement.bodyAsText
 import kotlinx.collections.immutable.ImmutableList
 import kotlinx.collections.immutable.ImmutableMap
 import kotlinx.collections.immutable.persistentListOf
@@ -23,6 +26,7 @@ import li.songe.gkd.data.CategoryConfig
 import li.songe.gkd.data.GlobalRule
 import li.songe.gkd.data.RawSubscription
 import li.songe.gkd.data.SubsConfig
+import li.songe.gkd.data.SubsVersion
 import li.songe.gkd.db.DbSet
 
 val subsItemsFlow by lazy {
@@ -236,22 +240,68 @@ fun initSubsState() {
     subsItemsFlow.value
     appScope.launchTry(Dispatchers.IO) {
         if (subsFolder.exists() && subsFolder.isDirectory) {
-            val fileRegex = Regex("^-?\\d+\\.json$")
-            val files =
-                subsFolder.listFiles { f -> f.isFile && f.name.matches(fileRegex) } ?: emptyArray()
-            val subscriptions = files.mapNotNull { f ->
-                try {
-                    RawSubscription.parse(f.readText())
-                } catch (e: Exception) {
-                    LogUtils.d("加载订阅文件失败", e)
-                    null
+            updateSubsFileMutex.withLock {
+                val fileRegex = Regex("^-?\\d+\\.json$")
+                val files =
+                    subsFolder.listFiles { f -> f.isFile && f.name.matches(fileRegex) }
+                        ?: emptyArray()
+                val subscriptions = files.mapNotNull { f ->
+                    try {
+                        RawSubscription.parse(f.readText())
+                    } catch (e: Exception) {
+                        LogUtils.d("加载订阅文件失败", e)
+                        null
+                    }
+                }
+                val newMap = subsIdToRawFlow.value.toMutableMap()
+                subscriptions.forEach { s ->
+                    newMap[s.id] = s
                 }
+                subsIdToRawFlow.value = newMap.toImmutableMap()
             }
-            val newMap = subsIdToRawFlow.value.toMutableMap()
-            subscriptions.forEach { s ->
-                newMap[s.id] = s
+        }
+    }
+}
+
+fun checkSubsUpdate() = appScope.launchTry(Dispatchers.IO) { // 自动从网络更新订阅文件
+    updateSubsFileMutex.withLock {
+        LogUtils.d("开始自动检测更新")
+        subsItemsFlow.value.forEach { subsItem ->
+            if (subsItem.updateUrl == null) return@forEach
+            try {
+                val oldSubsRaw = subsIdToRawFlow.value[subsItem.id]
+                if (oldSubsRaw?.checkUpdateUrl != null) {
+                    try {
+                        val subsVersion =
+                            client.get(oldSubsRaw.checkUpdateUrl).body<SubsVersion>()
+                        LogUtils.d("快速检测更新成功", subsVersion)
+                        if (subsVersion.id == oldSubsRaw.id && subsVersion.version <= oldSubsRaw.version) {
+                            return@forEach
+                        }
+                    } catch (e: Exception) {
+                        LogUtils.d("快速检测更新失败", subsItem, e)
+                    }
+                }
+                val newSubsRaw = RawSubscription.parse(
+                    client.get(oldSubsRaw?.updateUrl ?: subsItem.updateUrl).bodyAsText()
+                )
+                if (newSubsRaw.id != subsItem.id) {
+                    return@forEach
+                }
+                if (oldSubsRaw != null && newSubsRaw.version <= oldSubsRaw.version) {
+                    return@forEach
+                }
+                updateSubscription(newSubsRaw)
+                val newItem = subsItem.copy(
+                    mtime = System.currentTimeMillis()
+                )
+                DbSet.subsItemDao.update(newItem)
+                LogUtils.d("更新订阅文件:${newSubsRaw.name}")
+            } catch (e: Exception) {
+                e.printStackTrace()
+                LogUtils.d("检测更新失败", e)
             }
-            subsIdToRawFlow.value = newMap.toImmutableMap()
         }
+        LogUtils.d("自动检测更新结束")
     }
-}
\ No newline at end of file
+}