１．安装
pip install django-cors-headers

２．修改settings.py

INSTALLED_APPS = [
    ......
    'corsheaders',
    ......
]

MIDDLEWARE = [
    ......
    'corsheaders.middleware.CorsMiddleware',
    'django.middleware.common.CommonMiddleware',
    ......
]

CORS_ORIGIN_ALLOW_ALL = True
CORS_ALLOW_CREDENTIALS = True