diff --git a/cinder/db/migrations/versions/921e1a36b076_initial.py b/cinder/db/migrations/versions/921e1a36b076_initial.py
index f3eddaa15c2..4e1fb2794c2 100644
--- a/cinder/db/migrations/versions/921e1a36b076_initial.py
+++ b/cinder/db/migrations/versions/921e1a36b076_initial.py
@@ -44,7 +44,6 @@ CONF = cfg.CONF
 CONF.import_opt('quota_volumes', 'cinder.quota')
 CONF.import_opt('quota_snapshots', 'cinder.quota')
 CONF.import_opt('quota_gigabytes', 'cinder.quota')
-CONF.import_opt('quota_consistencygroups', 'cinder.quota')
 
 CLASS_NAME = 'default'
 CREATED_AT = datetime.datetime.now()  # noqa
@@ -994,13 +993,6 @@ def upgrade():
                 'hard_limit': CONF.quota_gigabytes,
                 'deleted': False,
             },
-            {
-                'created_at': CREATED_AT,
-                'class_name': CLASS_NAME,
-                'resource': 'consistencygroups',
-                'hard_limit': CONF.quota_consistencygroups,
-                'deleted': False,
-            },
             {
                 'created_at': CREATED_AT,
                 'class_name': CLASS_NAME,
diff --git a/cinder/db/migrations/versions/b7b88f50aab5_remove_quota_consistencygroups.py b/cinder/db/migrations/versions/b7b88f50aab5_remove_quota_consistencygroups.py
new file mode 100644
index 00000000000..3967fcf8cc9
--- /dev/null
+++ b/cinder/db/migrations/versions/b7b88f50aab5_remove_quota_consistencygroups.py
@@ -0,0 +1,45 @@
+# Licensed under the Apache License, Version 2.0 (the "License"); you may
+# not use this file except in compliance with the License. You may obtain
+# a copy of the License at
+#
+#     http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
+# WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
+# License for the specific language governing permissions and limitations
+# under the License.
+
+"""Remove quota consistencygroups
+
+Revision ID: b7b88f50aab5
+Revises: 9ab1b092a404
+Create Date: 2021-11-10 11:54:50.123389
+"""
+
+from alembic import op
+from sqlalchemy import orm
+
+from cinder.db.sqlalchemy import models
+
+
+# revision identifiers, used by Alembic.
+revision = 'b7b88f50aab5'
+down_revision = '9ab1b092a404'
+branch_labels = None
+depends_on = None
+
+
+def upgrade():
+    bind = op.get_bind()
+    session = orm.Session(bind=bind)
+
+    with session.begin():
+        for model in (models.QuotaClass,
+                      models.Quota,
+                      models.QuotaUsage,
+                      models.Reservation):
+
+            session.query(model)\
+                .filter_by(deleted=False, resource='consistencygroups')\
+                .update(model.delete_values())
diff --git a/cinder/db/sqlalchemy/api.py b/cinder/db/sqlalchemy/api.py
index 782ae8b3ca5..5218b43fedb 100644
--- a/cinder/db/sqlalchemy/api.py
+++ b/cinder/db/sqlalchemy/api.py
@@ -656,17 +656,6 @@ def _sync_gigabytes(
     return {key: vol_gigs + snap_gigs}
 
 
-def _sync_consistencygroups(
-    context,
-    project_id,
-    volume_type_id=None,
-    volume_type_name=None,
-):
-    _, groups = _consistencygroup_data_get_for_project(context, project_id)
-    key = 'consistencygroups'
-    return {key: groups}
-
-
 def _sync_backup_gigabytes(
     context,
     project_id,
@@ -697,7 +686,6 @@ QUOTA_SYNC_FUNCTIONS = {
     '_sync_volumes': _sync_volumes,
     '_sync_snapshots': _sync_snapshots,
     '_sync_gigabytes': _sync_gigabytes,
-    '_sync_consistencygroups': _sync_consistencygroups,
     '_sync_backups': _sync_backups,
     '_sync_backup_gigabytes': _sync_backup_gigabytes,
     '_sync_groups': _sync_groups,
diff --git a/cinder/quota.py b/cinder/quota.py
index 4614b169159..aa88f2c97e0 100644
--- a/cinder/quota.py
+++ b/cinder/quota.py
@@ -39,9 +39,6 @@ quota_opts = [
     cfg.IntOpt('quota_snapshots',
                default=10,
                help='Number of volume snapshots allowed per project'),
-    cfg.IntOpt('quota_consistencygroups',
-               default=10,
-               help='Number of consistencygroups allowed per project'),
     cfg.IntOpt('quota_groups',
                default=10,
                help='Number of groups allowed per project'),
@@ -910,30 +907,6 @@ class VolumeTypeQuotaEngine(QuotaEngine):
                                      new_res)
 
 
-class CGQuotaEngine(QuotaEngine):
-    """Represent the consistencygroup quotas."""
-
-    @property
-    def resources(self):
-        """Fetches all possible quota resources."""
-
-        result = {}
-        # Global quotas.
-        argses = [('consistencygroups', '_sync_consistencygroups',
-                   'quota_consistencygroups'), ]
-        for args in argses:
-            resource = ReservableResource(*args)
-            result[resource.name] = resource
-
-        return result
-
-    def register_resource(self, resource):
-        raise NotImplementedError(_("Cannot register resource"))
-
-    def register_resources(self, resources):
-        raise NotImplementedError(_("Cannot register resources"))
-
-
 class GroupQuotaEngine(QuotaEngine):
     """Represent the group quotas."""
 
@@ -959,6 +932,5 @@ class GroupQuotaEngine(QuotaEngine):
 
 
 QUOTAS = VolumeTypeQuotaEngine()
-CGQUOTAS = CGQuotaEngine()
 GROUP_QUOTAS = GroupQuotaEngine()
 NON_QUOTA_KEYS = ['tenant_id', 'id']
diff --git a/cinder/tests/unit/db/test_migrations.py b/cinder/tests/unit/db/test_migrations.py
index 98efdd127e3..e004cbea3de 100644
--- a/cinder/tests/unit/db/test_migrations.py
+++ b/cinder/tests/unit/db/test_migrations.py
@@ -369,6 +369,18 @@ class MigrationsWalk(
         snapshots = db_utils.get_table(connection, 'snapshots')
         self.assertFalse(snapshots.c.use_quota.nullable)
 
+    def _check_b7b88f50aab5(self, connection):
+        """Test consistencygroups quota was removed."""
+        quota_classes = db_utils.get_table(connection, 'quota_classes')
+        res = connection.execute(
+            quota_classes.select().where(
+                sqlalchemy.and_(
+                    quota_classes.c.resource == 'consistencygroups',
+                    ~quota_classes.c.deleted,
+                    quota_classes.c.class_name == 'default')
+            )).all()
+        self.assertListEqual([], res)
+
     # TODO: (D Release) Uncomment method _check_afd7494d43b7 and create a
     # migration with hash afd7494d43b7 using the following command:
     #   $ tox -e venv -- alembic -c cinder/db/alembic.ini revision \