driver = webdriver.Chrome()
    driver.get('https://www.tianyancha.com/company/256283648') #先不添加就请求一次
    cookies = {
        'TYCID': '71b12660d7f311e880d78365f0abdc98',
        'undefined': '71b12660d7f311e880d78365f0abdc98',
        'ssuid': '4887198200',
        '_ga': 'GA1.2.768229795.1540430128',
        'Hm_lvt_e92c8d65d92d534b0fc290df538b4758': '1541471290,1541554579,1541587929,1541588890',
        'aliyungf_tc': 'AQAAAOJGQFKR+wQALcoFcGA/NZPpSYh/',
        'csrfToken': 'OL7DSne1tpq4IiRqC5M-N3f1',
        'RTYCID': 'ad399706d6e545c08a567306be5f2a8b',
        'CT_TYCID': '3938c1972fe5473fa2a7b6690b1676a2',
        'tyc-user-info': '%257B%2522myQuestionCount%2522%253A%25220%2522%252C%2522integrity%2522%253A%25220%2525%2522%252C%2522state%2522%253A%25220%2522%252C%2522vipManager%2522%253A%25220%2522%252C%2522onum%2522%253A%25220%2522%252C%2522monitorUnreadCount%2522%253A%25224%2522%252C%2522discussCommendCount%2522%253A%25220%2522%252C%2522token%2522%253A%2522eyJhbGciOiJIUzUxMiJ9.eyJzdWIiOiIxNzE4MDQ3NTE2MyIsImlhdCI6MTU0MTk4NDQ4OSwiZXhwIjoxNTU3NTM2NDg5fQ.QloyEV9nPyAOuz2lcAlg9VHCX4r3xF-rlh76Sr9v0oHLFhQmRLYc3b24kr40CTubmyitrlTybSbRy23RSFcygA%2522%252C%2522redPoint%2522%253A%25220%2522%252C%2522pleaseAnswerCount%2522%253A%25220%2522%252C%2522vnum%2522%253A%25220%2522%252C%2522bizCardUnread%2522%253A%25220%2522%252C%2522mobile%2522%253A%252217180475163%2522%257D',
        'auth_token': 'eyJhbGciOiJIUzUxMiJ9.eyJzdWIiOiIxNzE4MDQ3NTE2MyIsImlhdCI6MTU0MTk4NDQ4OSwiZXhwIjoxNTU3NTM2NDg5fQ.QloyEV9nPyAOuz2lcAlg9VHCX4r3xF-rlh76Sr9v0oHLFhQmRLYc3b24kr40CTubmyitrlTybSbRy23RSFcygA',
        'cloud_token': '3b469e906aec44a5a81e451d70ebb90d',
        'cloud_utm': '512d3ff8dc0c45aab61a5af04eb93c72',
    }
    driver.add_cookie({'name':'TYCID','value':cookies['TYCID']})
    driver.add_cookie({'name':'undefined','value':cookies['undefined']})
    driver.add_cookie({'name':'ssuid','value':cookies['ssuid']})
    driver.add_cookie({'name':'Hm_lvt_e92c8d65d92d534b0fc290df538b4758','value':cookies['Hm_lvt_e92c8d65d92d534b0fc290df538b4758']})
    driver.add_cookie({'name':'aliyungf_tc','value':cookies['aliyungf_tc']})
    driver.add_cookie({'name':'csrfToken','value':cookies['csrfToken']})
    driver.add_cookie({'name':'RTYCID','value':cookies['RTYCID']})
    driver.add_cookie({'name':'CT_TYCID','value':cookies['CT_TYCID']})
    driver.add_cookie({'name':'tyc-user-info','value':cookies['tyc-user-info']})
    driver.add_cookie({'name':'auth_token','value':cookies['auth_token']})
    driver.add_cookie({'name':'cloud_token','value':cookies['cloud_token']})
    driver.add_cookie({'name':'cloud_utm','value':cookies['cloud_utm']})

    driver.get('https://www.tianyancha.com/company/256283648')

有两个需要注意的点：

一，需要先进入目标网站（可以先请求下这个网站的首页），然后在添加cookies，最后再次请求目标网站。否则会有以下报错：

selenium.common.exceptions.WebDriverException: Message: unable to set cookie
  (Session info: chrome=70.0.3538.77)
  (Driver info: chromedriver=2.42.591088 (7b2b2dca23cca0862f674758c9a3933e685c27d5),platform=Windows NT 10.0.17134 x86_64)

二：cookies中的值是通过 name,value来添加，所以过程比直接放到headers中要麻烦很多。