diff --git a/src/main/java/expvintl/tools/LoginHandler.java b/src/main/java/expvintl/tools/LoginHandler.java
new file mode 100644
index 0000000..6b92249
--- /dev/null
+++ b/src/main/java/expvintl/tools/LoginHandler.java
@@ -0,0 +1,80 @@
+package expvintl.tools;
+
+import org.bukkit.configuration.file.YamlConfiguration;
+import org.bukkit.event.EventHandler;
+import org.bukkit.event.Listener;
+import org.bukkit.event.block.BlockBreakEvent;
+import org.bukkit.event.block.BlockPlaceEvent;
+import org.bukkit.event.inventory.InventoryClickEvent;
+import org.bukkit.event.player.*;
+
+import java.util.ArrayList;
+import java.util.List;
+
+public class LoginHandler implements Listener {
+    private List<String> loggedPlayer=new ArrayList<>();
+    private YamlConfiguration cfg=Tools.loginConfig;
+    @EventHandler
+    public void onBlockBreak(BlockBreakEvent event){
+        if(!isLogged(event.getPlayer().getName())) event.setCancelled(true);
+    }
+    @EventHandler
+    public void onBlockPlace(BlockPlaceEvent event){
+        if(!isLogged(event.getPlayer().getName())) event.setCancelled(true);
+    }
+    @EventHandler
+    public void onPlayerMove(PlayerMoveEvent event){
+        if(!isLogged(event.getPlayer().getName())) event.setCancelled(true);
+    }
+    @EventHandler
+    public void onPlayerChat(AsyncPlayerChatEvent event){
+        if(!isLogged(event.getPlayer().getName())) event.setCancelled(true);
+    }
+    @EventHandler
+    public void onPlayerDropItem(PlayerDropItemEvent event){
+        if(!isLogged(event.getPlayer().getName())) event.setCancelled(true);
+    }
+    @EventHandler
+    public void onPlayerInteract(PlayerInteractEvent event){
+        if(!isLogged(event.getPlayer().getName())) event.setCancelled(true);
+    }
+    @EventHandler
+    public void onPlayerBedEnter(PlayerBedEnterEvent event){
+        if(!isLogged(event.getPlayer().getName())) event.setCancelled(true);
+    }
+    @EventHandler
+    public void onInventoryClick(InventoryClickEvent event){
+        if(!isLogged(event.getWhoClicked().getName())) event.setCancelled(true);
+    }
+    @EventHandler
+    public void onPlayerCommand(PlayerCommandPreprocessEvent event){
+        if(!isLogged(event.getPlayer().getName())) {
+            if (!event.getMessage().startsWith("/l") && !event.getMessage().startsWith("/reg")) {
+                event.setCancelled(true);
+            }
+        }
+    }
+    @EventHandler
+    public void onPlayerQuit(PlayerQuitEvent event){
+        if(isLogged(event.getPlayer().getName())){
+            loggedPlayer.remove(event.getPlayer().getName());
+        }
+    }
+    @EventHandler
+    public void onPlayerJoin(PlayerJoinEvent event){
+        if(isRegistered(event.getPlayer().getName())) {
+            event.getPlayer().sendMessage("请使用 \"/l 密码\" 来登录!");
+        }else{
+            event.getPlayer().sendMessage("您似乎没有注册，请使用 \"/reg 密码 确认密码\" 来注册!");
+        }
+    }
+    public List<String> getLoggedPlayer(){
+        return loggedPlayer;
+    }
+    public boolean isRegistered(String name){
+        return cfg.getString(name)!=null;
+    }
+    public boolean isLogged(String name){
+        return loggedPlayer.contains(name);
+    }
+}
diff --git a/src/main/java/expvintl/tools/Tools.java b/src/main/java/expvintl/tools/Tools.java
index 78dbd6c..c87061d 100644
--- a/src/main/java/expvintl/tools/Tools.java
+++ b/src/main/java/expvintl/tools/Tools.java
@@ -3,61 +3,146 @@ package expvintl.tools;
 import org.bukkit.Location;
 import org.bukkit.command.Command;
 import org.bukkit.command.CommandSender;
+import org.bukkit.configuration.file.YamlConfiguration;
 import org.bukkit.entity.Player;
 import org.bukkit.plugin.java.JavaPlugin;
 
+import java.io.File;
+import java.io.IOException;
 import java.util.Objects;
 import java.util.Random;
 import java.util.logging.Logger;
+import java.util.regex.Pattern;
 
 public final class Tools extends JavaPlugin {
-
+    private LoginHandler loginHandler;
+    public static YamlConfiguration loginConfig;
+    private final String cfgPath=getDataFolder().getPath()+"/PlayerLoginData.yml";
     Logger logger=getLogger();
     @Override
     public void onEnable() {
         // Plugin startup logic
         logger.info("Plugin Enabled!");
+        loginHandler=new LoginHandler();
+        getServer().getPluginManager().registerEvents(loginHandler,this);
+    }
+
+    @Override
+    public void onLoad() {
+        if(!getDataFolder().exists()) getDataFolder().mkdir();
+        File conf=new File(cfgPath);
+        if(!conf.exists()) {
+            try {
+                if(!conf.createNewFile()) return;
+            } catch (IOException e) {
+                logger.warning(e.getMessage());
+            }
+        }
+            try {
+                loginConfig = new YamlConfiguration();
+                loginConfig.load(cfgPath);
+                logger.info("已加载配置!");
+            } catch (Exception e) {
+                logger.warning(e.getMessage());
+        }
     }
 
     @Override
     public boolean onCommand(CommandSender sender,Command command,String label,String[] args) {
         Player player=this.getServer().getPlayer(sender.getName());
         if(Objects.isNull(player)){
-            sender.sendMessage("��Ҳ�����!");
-            return false;
+            sender.sendMessage("玩家不存在!");
+            return true;
         }
-        if(label.equals("kill")){
-            if(args.length>0){
-                sender.sendMessage(args[0]+" ����");
+        switch(label) {
+            case "reg":
+                if (args.length == 2) {
+                    if (loginHandler.isRegistered(sender.getName())||loginHandler.isLogged(sender.getName())) {
+                        sender.sendMessage("你已经注册过了!");
+                        return true;
+                    }
+                    if (!args[0].equals(args[1])) {
+                        sender.sendMessage("两次密码不匹配!");
+                        return true;
+                    }
+                    if (args[0].length() < 6 || args[0].length() > 16) {
+                        sender.sendMessage("密码不能少于6位或大于16位!");
+                        return true;
+                    }
+                    if(!Pattern.matches("[A-Za-z0-9.-_]+",args[0])){
+                        sender.sendMessage("密码包含非法字符!\n请使用 大小写字母数字.-_等字符");
+                        return true;
+                    }
+                    loginConfig.set(sender.getName(), args[0]);
+                    try {
+                        loginConfig.save(cfgPath);
+                    } catch (IOException e) {
+                        logger.warning(e.getMessage());
+                        sender.sendMessage("密码保存失败!");
+                        return true;
+                    }
+                    loginHandler.getLoggedPlayer().add(sender.getName());
+                    sender.sendMessage("登录成功!");
+                    return true;
+                } else {
+                    sender.sendMessage("缺少参数!");
+                    return false;
+                }
+            case "l":
+                if(args.length==1){
+                    if(loginHandler.isLogged(sender.getName())){
+                        sender.sendMessage("你似乎已经登录过了?");
+                        return true;
+                    }
+                    String passwd=loginConfig.getString(sender.getName());
+                    if(passwd==null){
+                        sender.sendMessage("用户不存在!");
+                        return true;
+                    }
+                    if(!passwd.equals(args[0])){
+                        sender.sendMessage("密码错误!");
+                        return true;
+                    }
+                    loginHandler.getLoggedPlayer().add(sender.getName());
+                    sender.sendMessage("登录成功!");
+                    return true;
+                }else {
+                    sender.sendMessage("参数错误!");
+                    return false;
+                }
+            case "kill":
+                if(args.length>0){
+                    sender.sendMessage(args[0]+" 死了");
+                    return true;
+                }
+                player.setHealth(0);
                 return true;
-            }
-            player.setHealth(0);
-        }
-        if(label.equals("tp")){
-            if(args.length==4){
-                try {
-                    double x = Double.parseDouble(args[1]);
-                    double y = Double.parseDouble(args[2]);
-                    double z = Double.parseDouble(args[3]);
-                    player.teleport(new Location(player.getWorld(),x,y,z));
-                    getServer().broadcastMessage(String.format("%s ���͵��� X:%.2f Y:%.2f Z:%.2f",player.getName(),x,y,z));
-                }catch (NumberFormatException f) {
-                    sender.sendMessage("��������ָ�ʽ!");
+            case "tp":
+                if(args.length==4){
+                    try {
+                        double x = Double.parseDouble(args[1]);
+                        double y = Double.parseDouble(args[2]);
+                        double z = Double.parseDouble(args[3]);
+                        player.teleport(new Location(player.getWorld(),x,y,z));
+                        getServer().broadcastMessage(String.format("%s 传送到了 X:%.2f Y:%.2f Z:%.2f",player.getName(),x,y,z));
+                    }catch (NumberFormatException f) {
+                        sender.sendMessage("错误的数字格式!");
+                    }
+                }else if(args.length==3) {
+                    try {
+                        double x = Double.parseDouble(args[0]);
+                        double y = Double.parseDouble(args[1]);
+                        double z = Double.parseDouble(args[2]);
+                        player.teleport(new Location(player.getWorld(), x, y, z));
+                        getServer().broadcastMessage(String.format("%s 传送到了 X:%.2f Y:%.2f Z:%.2f", player.getName(), x, y, z));
+                    } catch (NumberFormatException f) {
+                        sender.sendMessage("错误的数字格式!");
+                    }
+                }else{
+                    sender.sendMessage("缺少应有的坐标参数!");
+                    return false;
                 }
-            }else if(args.length==3) {
-                try {
-                    double x = Double.parseDouble(args[0]);
-                    double y = Double.parseDouble(args[1]);
-                    double z = Double.parseDouble(args[2]);
-                    player.teleport(new Location(player.getWorld(), x, y, z));
-                    getServer().broadcastMessage(String.format("%s ���͵��� X:%.2f Y:%.2f Z:%.2f", player.getName(), x, y, z));
-                } catch (NumberFormatException f) {
-                    sender.sendMessage("��������ָ�ʽ!");
-                }
-            }else{
-                sender.sendMessage("ȱ��Ӧ�е��������!");
-                return false;
-            }
+                return true;
         }
         return true;
     }
@@ -66,9 +151,4 @@ public final class Tools extends JavaPlugin {
     public void onDisable() {
         // Plugin shutdown logic
     }
-
-    public Player getRandomOnlinePlayer(){
-        int r=new Random().nextInt(getServer().getOnlinePlayers().size());
-        return (Player)getServer().getOnlinePlayers().toArray()[r];
-    }
 }
diff --git a/src/main/resources/plugin.yml b/src/main/resources/plugin.yml
index 8866ee0..ddf1423 100644
--- a/src/main/resources/plugin.yml
+++ b/src/main/resources/plugin.yml
@@ -6,8 +6,14 @@ authors: [ expvintl ]
 description: Tools
 commands:
   kill:  #指令名
-    description: "kill self" #指令的注解
-    usage: /kill
+    description: "杀死自己" #指令的注解
+    usage: "用法: /kill"
   tp:
-    description: "teleport"
-    usage: /tp <玩家名> <x> <y> <z>
\ No newline at end of file
+    description: "传送到某个位置"
+    usage: "用法: /tp <玩家名> <x> <y> <z>"
+  reg:
+    description: "注册用户名"
+    usage: "用法: /reg 密码 确认密码"
+  l:
+    description: "登录账户"
+    usage: "用法: /l 密码"