diff --git a/hamster-chain-break/src/main/java/cn/hamster3/mc/plugin/chain/breaks/core/ConfigManager.java b/hamster-chain-break/src/main/java/cn/hamster3/mc/plugin/chain/breaks/core/ConfigManager.java
index f23bc79..2b58d85 100644
--- a/hamster-chain-break/src/main/java/cn/hamster3/mc/plugin/chain/breaks/core/ConfigManager.java
+++ b/hamster-chain-break/src/main/java/cn/hamster3/mc/plugin/chain/breaks/core/ConfigManager.java
@@ -9,25 +9,35 @@ import java.util.ArrayList;
 import java.util.List;
 
 public final class ConfigManager {
+    private static int maxChainBlocks;
     private static List<ToolGroup> toolGroups;
 
     private ConfigManager() {
     }
 
+    @SuppressWarnings("DataFlowIssue")
     public static void init() {
         ChainBreakPlugin plugin = ChainBreakPlugin.getInstance();
         plugin.saveDefaultConfig();
         plugin.reloadConfig();
         FileConfiguration pluginConfig = plugin.getConfig();
 
+        maxChainBlocks = pluginConfig.getInt("max-chain-blocks", 300);
+
         toolGroups = new ArrayList<>();
         ConfigurationSection toolGroupsConfig = pluginConfig.getConfigurationSection("tool-groups");
-        for (String key : toolGroupsConfig.getKeys(false)) {
-            ToolGroup group = new ToolGroup(toolGroupsConfig.getConfigurationSection(key));
-            toolGroups.add(group);
+        if (toolGroupsConfig != null) {
+            for (String key : toolGroupsConfig.getKeys(false)) {
+                ToolGroup group = new ToolGroup(toolGroupsConfig.getConfigurationSection(key));
+                toolGroups.add(group);
+            }
         }
     }
 
+    public static int getMaxChainBlocks() {
+        return maxChainBlocks;
+    }
+
     public static List<ToolGroup> getToolGroups() {
         return toolGroups;
     }
diff --git a/hamster-chain-break/src/main/java/cn/hamster3/mc/plugin/chain/breaks/listener/MainListener.java b/hamster-chain-break/src/main/java/cn/hamster3/mc/plugin/chain/breaks/listener/MainListener.java
index e5ffa2d..d0a1585 100644
--- a/hamster-chain-break/src/main/java/cn/hamster3/mc/plugin/chain/breaks/listener/MainListener.java
+++ b/hamster-chain-break/src/main/java/cn/hamster3/mc/plugin/chain/breaks/listener/MainListener.java
@@ -1,6 +1,7 @@
 package cn.hamster3.mc.plugin.chain.breaks.listener;
 
 import cn.hamster3.mc.plugin.chain.breaks.config.ToolGroup;
+import cn.hamster3.mc.plugin.chain.breaks.core.ConfigManager;
 import cn.hamster3.mc.plugin.chain.breaks.util.ChainBreakUtils;
 import org.bukkit.GameMode;
 import org.bukkit.Material;
@@ -32,6 +33,7 @@ public final class MainListener implements Listener {
     private MainListener() {
     }
 
+    @SuppressWarnings("deprecation")
     @EventHandler(ignoreCancelled = true)
     public void onBlockBreak(BlockBreakEvent event) {
         Player player = event.getPlayer();
@@ -92,7 +94,7 @@ public final class MainListener implements Listener {
                 }
                 result.add(relative);
                 nextSearchBlocks.add(relative);
-                if (result.size() > 300) {
+                if (result.size() > ConfigManager.getMaxChainBlocks()) {
                     return;
                 }
             }
diff --git a/hamster-chain-break/src/main/resources/config.yml b/hamster-chain-break/src/main/resources/config.yml
index fddca96..d3dca2d 100644
--- a/hamster-chain-break/src/main/resources/config.yml
+++ b/hamster-chain-break/src/main/resources/config.yml
@@ -1,11 +1,14 @@
-# 方块破坏的间隔时间
-# 单位: tick
-break-interval: 5
+# 最大连锁破坏的方块数量
+max-chain-blocks: 300
 
+# 工具组列表
 tool-groups:
+  # 工具组名称
   axe:
+    # 该工具组内的物品名称，支持正则表达式匹配
     tool-types:
       - ".*_axe"
+    # 该工具组内可以连锁破坏的方块，支持正则表达式匹配
     block-types:
       - ".*_wood"
       - ".*_log"