使用format_html允许html被呈现，否则它将只是纯文本。

在你的主url .py文件中添加以下内容(url .py在settings.py存在的目录中):

from django.contrib import admin
from django.utils.html import format_html

site_header = 'Your html snippet'
admin.site.site_header = format_html(site_header)

一个简单的方法是在项目文件夹中的urls.py文件中包含以下代码。

 in urls.py add 

  admin.site.site_header  =  "Site Header here"  
  admin.site.site_title  =  "Side title"
  admin.site.index_title  =  "Index title"

例如:

from django.contrib import admin
from django.urls import path
from django.conf.urls import include
from django.conf.urls.static import static
from django.conf import settings


admin.site.site_header  =  "Hadramawt Kitchen"  
admin.site.site_title  =  "Hadramawt Kitchen"
admin.site.index_title  =  "Hadramawt Admin"

urlpatterns = [
  path('admin/', admin.site.urls),
  path('', include('food_products.urls' )),
  path('categories', include('categories.urls' )),
  path('news', include('news.urls')),
  path('weeklyOffer', include('weekly_offer.urls'))
]+ static(settings.MEDIA_URL, document_root=settings.MEDIA_ROOT)

希望我不会太晚，最简单的是编辑admin.py文件。

admin.site.site_header = 'your_header'
admin.site.site_title = 'site_title'
admin.site.index_title = 'index_title'

对于Django 2.1.1，在urls.py中添加以下行

from django.contrib import admin

# Admin Site Config
admin.sites.AdminSite.site_header = 'My site admin header'
admin.sites.AdminSite.site_title = 'My site admin title'
admin.sites.AdminSite.index_title = 'My site admin index'

你不需要为这项工作更改任何模板，你只需要更新你的项目的settings.py。转到settings.py的底部并定义它。

admin.site.site_header = 'My Site Admin'

通过这种方式，你可以改变Django管理员的标题。此外，你可以在下面的链接中阅读更多关于Django Admin定制和设置的内容。

Django管理文档

从Django 1.7开始，你不需要重写模板。现在，您可以在自定义AdminSite上实现site_header、site_title和index_title属性，以便轻松更改管理站点的页面标题和标题文本。创建一个AdminSite子类，并将你的实例绑定到URLconf中:

admin.py:

from django.contrib.admin import AdminSite
from django.utils.translation import ugettext_lazy

class MyAdminSite(AdminSite):
    # Text to put at the end of each page's <title>.
    site_title = ugettext_lazy('My site admin')

    # Text to put in each page's <h1> (and above login form).
    site_header = ugettext_lazy('My administration')

    # Text to put at the top of the admin index page.
    index_title = ugettext_lazy('Site administration')

admin_site = MyAdminSite()

urls . py:

from django.conf.urls import patterns, include
from myproject.admin import admin_site

urlpatterns = patterns('',
    (r'^myadmin/', include(admin_site.urls)),
)

更新:正如oxfn所指出的，你可以直接在urls.py或admin.py中设置site_header，而不需要子类化AdminSite:

admin.site.site_header = 'My administration'