import requests
import json
import os

url = "https://cn.bing.com/HPImageArchive.aspx?format=js&idx=0&n=10&nc=1586230018677&pid=hp&uhd=1&uhdwidth=1920&uhdheight=1080"
html = requests.get(url=url).text
res = json.loads(html)

def save_file(name,uri):
    res = requests.get(uri)
    file=os.path.join(r'D:\script\bing\pic',str(name)+'.jpg')
    if os.path.exists(file):
        os.remove(file)
    with open (file,'wb') as f:
        f.write(res.content)

for i,j in enumerate(res.get('images')):
    save_file(i,'https://cn.bing.com/'+j.get('url'))