diff --git a/src/controllers/SalaryEmployeeController.ts b/src/controllers/SalaryEmployeeController.ts
index 224177f..71e6bd6 100644
--- a/src/controllers/SalaryEmployeeController.ts
+++ b/src/controllers/SalaryEmployeeController.ts
@@ -26,6 +26,7 @@ import HttpStatusCode from "../interfaces/http-status";
 import { SalaryRankEmployee } from "../entities/SalaryRankEmployee";
 import { randomUUID } from "crypto";
 import { Salarys } from "../entities/Salarys";
+import { SalaryFormulaEmployee } from "../entities/SalaryFormulaEmployee";
 
 @Route("api/v1/salary/employee")
 @Tags("SalaryEmployee")
@@ -33,6 +34,8 @@ import { Salarys } from "../entities/Salarys";
 export class SalaryEmployeeController extends Controller {
   private salaryEmployeeRepository = AppDataSource.getRepository(SalaryEmployee);
   private salaryRankEmployeeRepository = AppDataSource.getRepository(SalaryRankEmployee);
+  private salaryFormulaEmployeeRepository = AppDataSource.getRepository(SalaryFormulaEmployee);
+
   /**
    * API รายการผังเงินเดือนลูกจ้าง(Active)
    *
@@ -171,6 +174,16 @@ export class SalaryEmployeeController extends Controller {
         "ไม่สามารถลบข้อมูลนี้ได้ เนื่องจากเปิดใช้งานอยู่",
       );
     }
+
+    const chk_SalaryFormulaEmp = await this.salaryFormulaEmployeeRepository.find({
+      where: { salaryEmployeeId: id },
+    });
+    if(chk_SalaryFormulaEmp.length > 0){
+      throw new HttpError(
+        HttpStatusCode.NOT_FOUND,
+        "ไม่สามารถลบรายการนี้ได้เนื่องจากมีการใช้งานอยู่",
+      );
+    }
     const del_SalaryRank = await this.salaryRankEmployeeRepository.find({
       where: { salaryEmployeeId: chk_Salary.id },
     });