diff --git a/src/constant/err.type.js b/src/constant/err.type.js
index f18c056..1ee40f7 100644
--- a/src/constant/err.type.js
+++ b/src/constant/err.type.js
@@ -16,4 +16,5 @@ module.exports = {
   varietyNameAlreadyExisted: Response("50003", "鸡苗品种名称重复"),
   varietyReasonNameAlreadyExisted: Response("50004", "死亡原因名称重复"),
   factoryNameAlreadyExisted: Response("50005", "鸡苗厂家名称重复"),
+  exceedMaxChickenNumberIncoop: Response("50006", "进鸡数量超出鸡笼最大容纳量"),
 };
diff --git a/src/middleware/chicken.middleware.js b/src/middleware/chicken.middleware.js
new file mode 100644
index 0000000..bb9bc8f
--- /dev/null
+++ b/src/middleware/chicken.middleware.js
@@ -0,0 +1,16 @@
+const { getMaxChickenNumByIds } = require("../service/coop.service");
+const { exceedMaxChickenNumberIncoop } = require("../constant/err.type");
+
+const verifyChickenNumberRightful = async (ctx, next) => {
+  const { chicken_number, coop_id } = ctx.request.body;
+  const maxNumber = await getMaxChickenNumByIds(coop_id);
+  if (maxNumber < chicken_number) {
+    ctx.app.emit("error", exceedMaxChickenNumberIncoop, ctx);
+    return;
+  }
+  await next();
+};
+
+module.exports = {
+  verifyChickenNumberRightful,
+};
diff --git a/src/router/chicken.route.js b/src/router/chicken.route.js
index 2e6936e..dc794c0 100644
--- a/src/router/chicken.route.js
+++ b/src/router/chicken.route.js
@@ -4,6 +4,9 @@ const router = new Router({ prefix: "/chicken" });
 
 const { auth, hasAdminPermission } = require("../middleware/auth.middleware");
 const {
+  verifyChickenNumberRightful,
+} = require("../middleware/chicken.middleware");
+const {
   add,
   info,
   all,
@@ -12,7 +15,7 @@ const {
   ratio,
 } = require("../controller/chicken.controller");
 
-router.post("/add", auth, add);
+router.post("/add", auth, verifyChickenNumberRightful, add);
 
 // 根据id获取新进鸡苗记录详情。
 router.get("/info", auth, info);
diff --git a/src/service/coop.service.js b/src/service/coop.service.js
index 4a446a4..03bd3c3 100644
--- a/src/service/coop.service.js
+++ b/src/service/coop.service.js
@@ -116,36 +116,17 @@ class CoopService {
 
   // 查询空闲鸡舍
   // 没有进鸡记录的
+  // 目前鸡舍新增字段is_empty进行判断即可。
   async getEmptyCoopList(house_id) {
     const res = await Coop.findAll({
       where: {
         house_id,
+        is_empty: 1,
       },
     });
     const arr = res.map((item) => item.dataValues);
-    const coopidArr = res?.map((item) => item.dataValues.id);
-    // 筛选arr
-    const chickenList = await Chicken.findAll({
-      where: {
-        house_id,
-        is_marketed: 0,
-      },
-    });
-    const chickArr = chickenList.map((item) => item.dataValues.coop_id);
-    // 找到两个数组的非交集
-    const flat = chickArr
-      .map((item) => item.split(","))
-      .flat()
-      .map((item) => parseInt(item));
-    const resIds = findDiffArr(coopidArr, flat);
-    let realRes = [];
-    arr.map((item) => {
-      if (resIds.includes(item.id)) {
-        realRes.push(item);
-      }
-    });
     // realRes 即为空闲 鸡舍
-    return realRes;
+    return arr;
   }
 
   async getCoopNumbyHouseId(house_id) {
@@ -156,6 +137,23 @@ class CoopService {
     });
     return res;
   }
+
+  // 获得几个鸡舍的最大容纳量
+  async getMaxChickenNumByIds(coop_ids) {
+    const res = await Coop.findAll({
+      where: {
+        id: {
+          [Op.in]: coop_ids,
+        },
+      },
+    });
+    const arr = res.map((item) => item.dataValues);
+    let total = 0;
+    arr.map((item) => {
+      total += item.coop_cage_number * item.chicken_number;
+    });
+    return total;
+  }
 }
 
 module.exports = new CoopService();