diff --git a/src/controllers/certificate.controller.ts b/src/controllers/certificate.controller.ts
index a7e03ec..fa9dbeb 100644
--- a/src/controllers/certificate.controller.ts
+++ b/src/controllers/certificate.controller.ts
@@ -78,3 +78,33 @@ export const getCertificateByCourse = async (req: Request, res: Response) => {
     res.status(500).json({ message: 'Server error', error });
   }
 };
+
+export const getCertificatesByInstructor = async (req: Request, res: Response) => {
+  try {
+    const instructorId = req.user?._id;
+
+    if (!instructorId) {
+      return res.status(401).json({ message: 'User not authenticated' });
+    }
+
+    // First, find all courses created by this instructor
+    const Course = mongoose.model('Course');
+    const instructorCourses = await Course.find({ authorId: instructorId }).select('_id');
+
+    if (instructorCourses.length === 0) {
+      return res.status(200).json([]);
+    }
+
+    const courseIds = instructorCourses.map(course => course._id);
+
+    // Then, find all certificates for these courses
+    const certificates = await Certificate.find({ course: { $in: courseIds } })
+      .populate('user', 'name email')
+      .populate('course', 'title authorId')
+      .sort({ createdAt: -1 });
+
+    res.status(200).json(certificates);
+  } catch (error) {
+    res.status(500).json({ message: 'Server error', error });
+  }
+};
diff --git a/src/routes/certificate.route.ts b/src/routes/certificate.route.ts
index 3121beb..2725fda 100644
--- a/src/routes/certificate.route.ts
+++ b/src/routes/certificate.route.ts
@@ -1,6 +1,7 @@
 import express from 'express';
-import { getCertificateById, getCertificateByCourse, getAllCertificates, getCertificateByUser } from '../controllers/certificate.controller';
+import { getCertificateById, getCertificateByCourse, getAllCertificates, getCertificateByUser, getCertificatesByInstructor } from '../controllers/certificate.controller';
 import { isAuthenticated } from '../middlewares/auth/isAuthenticated';
+import { authorizeRoles } from '../middlewares/auth/authorizeRoles';
 
 const router = express.Router();
 
@@ -22,4 +23,9 @@ router.get('/course/:courseId', isAuthenticated, (req, res, next) => {
   getCertificateByCourse(req, res).catch(next);
 });
 
+// Lấy tất cả certificate của các khóa học do instructor tạo
+router.get('/instructor/courses', isAuthenticated, authorizeRoles('instructor'), (req, res, next) => {
+  getCertificatesByInstructor(req, res).catch(next);
+});
+
 export default router;