diff --git a/qinling/api/controllers/v1/function.py b/qinling/api/controllers/v1/function.py
index 5aa6549f..a80b351a 100644
--- a/qinling/api/controllers/v1/function.py
+++ b/qinling/api/controllers/v1/function.py
@@ -281,6 +281,10 @@ class FunctionsController(rest.RestController):
                 raise exc.NotAllowedException(
                     'The function is still associated with webhook(s).'
                 )
+            if len(func_db.aliases) > 0:
+                raise exc.NotAllowedException(
+                    'The function is still associated with function alias(es).'
+                )
 
             # Even admin user can not delete other project's function because
             # the trust associated can only be removed by function owner.
diff --git a/qinling/api/controllers/v1/function_version.py b/qinling/api/controllers/v1/function_version.py
index 25847d28..a4077366 100644
--- a/qinling/api/controllers/v1/function_version.py
+++ b/qinling/api/controllers/v1/function_version.py
@@ -243,7 +243,17 @@ class FunctionVersionsController(rest.RestController):
             )
             if len(version_webhook) > 0:
                 raise exc.NotAllowedException(
-                    'The function versioin is still associated with webhook.'
+                    'The function version is still associated with webhook.'
+                )
+
+            filters = rest_utils.get_filters(
+                function_id=version_db.function_id,
+                function_version=version_db.version_number
+            )
+            version_aliases = db_api.get_function_aliases(**filters)
+            if len(version_aliases) > 0:
+                raise exc.NotAllowedException(
+                    'The function version is still associated with alias.'
                 )
 
             # Delete resources for function version
diff --git a/qinling/db/sqlalchemy/models.py b/qinling/db/sqlalchemy/models.py
index d7764532..a7f2d7d1 100644
--- a/qinling/db/sqlalchemy/models.py
+++ b/qinling/db/sqlalchemy/models.py
@@ -164,3 +164,7 @@ Function.versions = relationship(
     lazy='select',
     cascade="all, delete-orphan"
 )
+Function.aliases = relationship(
+    "FunctionAlias",
+    uselist=True
+)
diff --git a/qinling/tests/unit/api/controllers/v1/test_function.py b/qinling/tests/unit/api/controllers/v1/test_function.py
index a3c70dba..9966b43d 100644
--- a/qinling/tests/unit/api/controllers/v1/test_function.py
+++ b/qinling/tests/unit/api/controllers/v1/test_function.py
@@ -377,6 +377,23 @@ class TestFunctionController(base.APITest):
 
         self.assertEqual(403, resp.status_int)
 
+    def test_delete_with_alias(self):
+        db_func = self.create_function(runtime_id=self.runtime_id)
+        func_id = db_func.id
+        name = self.rand_name(name="alias", prefix=self.prefix)
+        body = {
+            'function_id': func_id,
+            'name': name
+        }
+        db_api.create_function_alias(**body)
+
+        resp = self.app.delete(
+            '/v1/functions/%s' % func_id,
+            expect_errors=True
+        )
+
+        self.assertEqual(403, resp.status_int)
+
     @mock.patch('qinling.rpc.EngineClient.scaleup_function')
     def test_scale_up(self, scaleup_function_mock):
         db_func = self.create_function(runtime_id=self.runtime_id)
diff --git a/qinling/tests/unit/api/controllers/v1/test_function_version.py b/qinling/tests/unit/api/controllers/v1/test_function_version.py
index 048920f9..337c2db5 100644
--- a/qinling/tests/unit/api/controllers/v1/test_function_version.py
+++ b/qinling/tests/unit/api/controllers/v1/test_function_version.py
@@ -190,6 +190,24 @@ class TestFunctionVersionController(base.APITest):
 
         self.assertEqual(403, resp.status_int)
 
+    def test_delete_with_alias(self):
+        db_api.increase_function_version(self.func_id, 0,
+                                         description="version 1")
+        name = self.rand_name(name="alias", prefix=self.prefix)
+        body = {
+            'function_id': self.func_id,
+            'function_version': 1,
+            'name': name
+        }
+        db_api.create_function_alias(**body)
+
+        resp = self.app.delete(
+            '/v1/functions/%s/versions/1' % self.func_id,
+            expect_errors=True
+        )
+
+        self.assertEqual(403, resp.status_int)
+
     @mock.patch('qinling.rpc.EngineClient.scaleup_function')
     def test_scale_up(self, scaleup_function_mock):
         db_api.increase_function_version(self.func_id, 0)