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To allow users to upload multiple files in Django admin models, you can follow these steps:

1. In your models.py file, create a model field for your files using the FileField or ImageField class. Make sure to set the 'upload_to' attribute to specify where the files should be saved.

   Example:

   from django.db import models
   
   class MyModel(models.Model):
       files = models.FileField(upload_to='uploads/')
   

2. In your admin.py file, create a form for your model using the ModelForm class. Set the widget for the file field to FileInputMultiple.

   Example:

   from django import forms
   from django.contrib import admin
   from django.forms import FileInputMultiple
   
   from .models import MyModel
   
   class MyModelForm(forms.ModelForm):
       class Meta:
           model = MyModel
           fields = ['files']
           widgets = {
               'files': FileInputMultiple()
           }
   
   class MyModelAdmin(admin.ModelAdmin):
       form = MyModelForm
   
   admin.site.register(MyModel, MyModelAdmin)
   

3. Make sure to include the form field in your admin model fields list so the form is displayed in the admin interface.

   Example:

   class MyModelAdmin(admin.ModelAdmin):
       form = MyModelForm
       list_display = ['id', 'files']
       fields = ['files']
   

With these steps, your users will now be able to upload multiple files using the Django admin interface.