diff --git a/src/main/java/dev/modzuozhi/mixin/ChunkMapEntityMapMixin.java b/src/main/java/dev/modzuozhi/mixin/ChunkMapEntityMapMixin.java
new file mode 100644
index 0000000..0f67450
--- /dev/null
+++ b/src/main/java/dev/modzuozhi/mixin/ChunkMapEntityMapMixin.java
@@ -0,0 +1,34 @@
+package dev.modzuozhi.mixin;
+
+import dev.modzuozhi.core.collection.Int2ObjectConcurrentHashMap;
+import it.unimi.dsi.fastutil.ints.Int2ObjectMap;
+import net.minecraft.server.level.ChunkMap;
+import org.spongepowered.asm.mixin.Mixin;
+import org.spongepowered.asm.mixin.Shadow;
+
+/**
+ * 实体跟踪表（{@code ChunkMap.entityMap}）并发化（借鉴 MCMT/Async 思路，独立实现）。
+ * <p>
+ * {@code entityMap}（{@code Int2ObjectOpenHashMap<TrackedEntity>}）记录所有被跟踪实体。
+ * 维度并行下存在两条<b>不同线程</b>的访问路径：
+ * <ul>
+ *     <li><b>玩家移动包处理</b>（维度 worker）：{@code handleMovePlayer → ChunkMap.move} 遍历
+ *         {@code entityMap.values()} 更新玩家可见实体；</li>
+ *     <li><b>实体并行子任务</b>（SUB_POOL）：tick 其它实体时实体生成/死亡/进出视距 →
+ *         {@code ChunkMap.addEntity/removeEntity} 并发 {@code put/remove} 同一张表。</li>
+ * </ul>
+ * fastutil {@code Int2ObjectOpenHashMap} 遍历与修改并发 → 迭代器损坏（{@code wrapped=null}
+ * NPE）→ 移动包处理失败刷屏 → 主线程 {@code Can't keep up} → 玩家"连接中断"掉线（实测：
+ * 大量女仆/召唤物生成时快速跑图必现）。
+ * <p>
+ * 修复：用 {@link Int2ObjectConcurrentHashMap}（内部 {@code ConcurrentHashMap}，弱一致迭代）
+ * 替换 {@code entityMap} 实例（{@code @Shadow} 初始值替换，与 {@code EntityLookupMixin}/
+ * {@code PoiSectionMixin} 相同的已验证模式）。遍历与增删并发不再抛 NPE/CME，纯加固，
+ * 不改变任何 tick 归属与调度逻辑。
+ */
+@Mixin(ChunkMap.class)
+public abstract class ChunkMapEntityMapMixin {
+
+    @Shadow
+    private final Int2ObjectMap<?> entityMap = new Int2ObjectConcurrentHashMap<>();
+}
diff --git a/src/main/resources/dimensionalripper.mixins.json b/src/main/resources/dimensionalripper.mixins.json
index 9995018..7b8335f 100644
--- a/src/main/resources/dimensionalripper.mixins.json
+++ b/src/main/resources/dimensionalripper.mixins.json
@@ -11,6 +11,7 @@
         "BlockableEventLoopPollMixin",
         "BlockDropCaptureMixin",
         "BrainMixin",
+        "ChunkMapEntityMapMixin",
         "ChunkMapLoadOffloadMixin",
         "ClassInstanceMultiMapMixin",
         "CollectingNeighborUpdaterMixin",