diff --git a/app/src/main/java/io/legado/app/help/coroutine/CompositeCoroutine.kt b/app/src/main/java/io/legado/app/help/coroutine/CompositeCoroutine.kt
new file mode 100644
index 000000000..99c2df223
--- /dev/null
+++ b/app/src/main/java/io/legado/app/help/coroutine/CompositeCoroutine.kt
@@ -0,0 +1,85 @@
+package io.legado.app.help.coroutine
+
+class CompositeCoroutine : CoroutineContainer {
+
+    private var resources: HashSet<Coroutine<*>>? = null
+
+    val size: Int
+        get() = resources?.size ?: 0
+
+    val isEmpty: Boolean
+        get() = size == 0
+
+    constructor()
+
+    constructor(vararg coroutines: Coroutine<*>) {
+        this.resources = hashSetOf(*coroutines)
+    }
+
+    constructor(coroutines: Iterable<Coroutine<*>>) {
+        this.resources = hashSetOf()
+        for (d in coroutines) {
+            this.resources?.add(d)
+        }
+    }
+
+    override fun add(coroutine: Coroutine<*>): Boolean {
+        synchronized(this) {
+            var set: HashSet<Coroutine<*>>? = resources
+            if (resources == null) {
+                set = hashSetOf()
+                resources = set
+            }
+            return set!!.add(coroutine)
+        }
+    }
+
+    override fun addAll(vararg coroutines: Coroutine<*>): Boolean {
+        synchronized(this) {
+            var set: HashSet<Coroutine<*>>? = resources
+            if (resources == null) {
+                set = hashSetOf()
+                resources = set
+            }
+            for (coroutine in coroutines) {
+                val add = set!!.add(coroutine)
+                if (!add) {
+                    return false
+                }
+            }
+        }
+        return true
+    }
+
+    override fun remove(coroutine: Coroutine<*>): Boolean {
+        if (delete(coroutine)) {
+            coroutine.cancel()
+            return true
+        }
+        return false
+    }
+
+    override fun delete(coroutine: Coroutine<*>): Boolean {
+        synchronized(this) {
+            val set = resources
+            if (set == null || !set.remove(coroutine)) {
+                return false
+            }
+        }
+        return true
+    }
+
+    override fun clear() {
+        val set: HashSet<Coroutine<*>>?
+        synchronized(this) {
+            set = resources
+            resources = null
+        }
+
+        set?.forEach {
+            runCatching {
+                it.cancel()
+            }
+        }
+    }
+}
\ No newline at end of file
diff --git a/app/src/main/java/io/legado/app/help/coroutine/CoroutineContainer.kt b/app/src/main/java/io/legado/app/help/coroutine/CoroutineContainer.kt
new file mode 100644
index 000000000..d98a2b8da
--- /dev/null
+++ b/app/src/main/java/io/legado/app/help/coroutine/CoroutineContainer.kt
@@ -0,0 +1,15 @@
+package io.legado.app.help.coroutine
+
+interface CoroutineContainer {
+
+    fun add(coroutine: Coroutine<*>): Boolean
+
+    fun addAll(vararg coroutines: Coroutine<*>): Boolean
+
+    fun remove(coroutine: Coroutine<*>): Boolean
+
+    fun delete(coroutine: Coroutine<*>): Boolean
+
+    fun clear()
+
+}
diff --git a/app/src/main/java/io/legado/app/model/webbook/SourceDebug.kt b/app/src/main/java/io/legado/app/model/webbook/SourceDebug.kt
index 03e9d0446..919be87a6 100644
--- a/app/src/main/java/io/legado/app/model/webbook/SourceDebug.kt
+++ b/app/src/main/java/io/legado/app/model/webbook/SourceDebug.kt
@@ -4,6 +4,7 @@ import android.annotation.SuppressLint
 import io.legado.app.data.entities.Book
 import io.legado.app.data.entities.BookChapter
 import io.legado.app.help.BookHelp
+import io.legado.app.help.coroutine.CompositeCoroutine
 import io.legado.app.help.coroutine.Coroutine
 import io.legado.app.model.WebBook
 import io.legado.app.utils.htmlFormat
@@ -16,7 +17,7 @@ class SourceDebug(private val webBook: WebBook, callback: Callback) {
     companion object {
         private var debugSource: String? = null
         private var callback: Callback? = null
-        private val tasks: MutableList<Coroutine<*>> = mutableListOf()
+        private val tasks: CompositeCoroutine = CompositeCoroutine()
 
         @SuppressLint("ConstantLocale")
         private val DEBUG_TIME_FORMAT = SimpleDateFormat("[mm:ss.SSS]", Locale.getDefault())
@@ -34,11 +35,6 @@ class SourceDebug(private val webBook: WebBook, callback: Callback) {
         }
 
         fun cancelDebug(destroy: Boolean = false) {
-            tasks.forEach {
-                if (!it.isCancelled) {
-                    it.cancel()
-                }
-            }
             tasks.clear()
 
             if (destroy) {