环境

Python 3.7.7
Django 2.2.16
django-import-export 2.4.0

示例

admin.py

from django.contrib import admin
from import_export.admin import ImportExportModelAdmin, ExportMixin
from import_export.formats import base_formats


class ExportMixinAdmin(ExportMixin, admin.ModelAdmin):


    def get_export_formats(self):
        formats = (
            base_formats.XLSX,
            base_formats.CSV,
            base_formats.JSON,
            base_formats.XLS,
            )

        return [f for f in formats if f().can_export()]

    class Meta:
        abstract = True


@admin.register(Task)
class TaskAdmin(ExportMixinAdmin):
    pass

参考

stackoverflow.com/questions/45930421/how-to-have-only-csv-xls-xlsx-options-in-django-import-export