diff --git a/src/controller/factory.controller.js b/src/controller/factory.controller.js
index c137324..45c449e 100644
--- a/src/controller/factory.controller.js
+++ b/src/controller/factory.controller.js
@@ -20,7 +20,11 @@ class FactoryController {
   async deleteItem(ctx, next) {
     const { id } = ctx.request.body;
     const res = await deleteFactoryById(id);
-    ctx.body = Response(0, "删除鸡苗厂家成功", res);
+    if (res) {
+      ctx.body = Response(0, "删除鸡苗厂家成功", res);
+    } else {
+      ctx.body = Response(500, "存在进鸡厂家为该厂家，不可删除", res);
+    }
   }
 }
 
diff --git a/src/controller/reason.controller.js b/src/controller/reason.controller.js
index 0a72c3d..72a2c27 100644
--- a/src/controller/reason.controller.js
+++ b/src/controller/reason.controller.js
@@ -19,7 +19,11 @@ class ReasonController {
   async deleteItem(ctx, next) {
     const { id } = ctx.request.body;
     const res = await deleteReasonById(id);
-    ctx.body = Response(0, "删除死亡原因成功", res);
+    if (res) {
+      ctx.body = Response(0, "删除死亡原因成功", res);
+    } else {
+      ctx.body = Response(500, "存在死淘记录使用了该死亡原因，不可删除", res);
+    }
   }
 }
 
diff --git a/src/controller/variety.controller.js b/src/controller/variety.controller.js
index f0f99d7..643a31b 100644
--- a/src/controller/variety.controller.js
+++ b/src/controller/variety.controller.js
@@ -20,7 +20,11 @@ class VarietyController {
   async deleteItem(ctx, next) {
     const { id } = ctx.request.body;
     const res = await deleteVarietyById(id);
-    ctx.body = Response(0, "删除鸡苗品种成功", res);
+    if (res) {
+      ctx.body = Response(0, "删除鸡苗品种成功", res);
+    } else {
+      ctx.body = Response(500, "存在进鸡为该品种，不可删除", res);
+    }
   }
 }
 
diff --git a/src/service/factory.service.js b/src/service/factory.service.js
index 0973dfa..dc87c49 100644
--- a/src/service/factory.service.js
+++ b/src/service/factory.service.js
@@ -1,4 +1,5 @@
 const Factory = require("../model/factory.model");
+const Chicken = require("../model/chicken.model");
 class FactoryService {
   async getAllFactory() {
     const res = await Factory.findAll();
@@ -33,6 +34,16 @@ class FactoryService {
   }
 
   async deleteFactoryById(id) {
+    const whereOpt = { is_marketed: 0, factory_id: id };
+    const chickInfo = await Chicken.findAll({
+      where: whereOpt,
+    });
+    if (chickInfo) {
+      const arr = chickInfo.map((item) => item.dataValues);
+      if (arr.length > 0) {
+        return false;
+      }
+    }
     const res = await Factory.destroy({
       where: {
         id,
diff --git a/src/service/reason.service.js b/src/service/reason.service.js
index 04c7292..9c4304f 100644
--- a/src/service/reason.service.js
+++ b/src/service/reason.service.js
@@ -1,4 +1,5 @@
 const Reason = require("../model/reason.model");
+const Die = require("../model/die.model");
 class ReasonService {
   async getAllReason() {
     const res = await Reason.findAll();
@@ -32,6 +33,16 @@ class ReasonService {
   }
 
   async deleteReasonById(id) {
+    const whereOpt = { reason_id: id };
+    const dieInfo = await Die.findAll({
+      where: whereOpt,
+    });
+    if (dieInfo) {
+      const arr = dieInfo.map((item) => item.dataValues);
+      if (arr.length > 0) {
+        return false;
+      }
+    }
     const res = await Reason.destroy({
       where: {
         id,
diff --git a/src/service/variety.service.js b/src/service/variety.service.js
index e95ec80..f122b13 100644
--- a/src/service/variety.service.js
+++ b/src/service/variety.service.js
@@ -1,4 +1,5 @@
 const Variety = require("../model/variety.model");
+const Chicken = require("../model/chicken.model");
 class VarietyService {
   async getAllVariety() {
     const res = await Variety.findAll();
@@ -32,6 +33,16 @@ class VarietyService {
   }
 
   async deleteVarietyById(id) {
+    const whereOpt = { is_marketed: 0, variety_id: id };
+    const chickInfo = await Chicken.findAll({
+      where: whereOpt,
+    });
+    if (chickInfo) {
+      const arr = chickInfo.map((item) => item.dataValues);
+      if (arr.length > 0) {
+        return false;
+      }
+    }
     const res = await Variety.destroy({
       where: {
         id,