支付宝可以买火车票，支付宝想买多少张票都可以，只有12306账号才有规定最多一次能买5张车票的，用12306账号预定火车票选择车次和乘车人和日期，如果有票就会让你付款，然后选项里边有各种网银付款和支付宝付款，选择支付宝付款并输入支付密码就可以了。
具体登录购买步骤如下：
1、打开支付宝主页面，点击更多。
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2、在页面中找到并点击火车票机票。
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3、在火车票预订页面，输入对应的出发地、到达地、出发时间，点击开始搜索。
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https://iknow-pic.cdn.bcebos.com/caef76094b36acaf305ee91672d98d1000e99c99"/>
4、选择车次，点击进入车次详情页面。
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https://iknow-pic.cdn.bcebos.com/3801213fb80e7bec72b27d0b212eb9389a506beb"/>
5、选择座位类型，点击立即预订。
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https://iknow-pic.cdn.bcebos.com/77c6a7efce1b9d16c8afe48bfddeb48f8d5464eb"/>
6、在登录界面中，输入12306的账号以及密码，点击登录。
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https://iknow-pic.cdn.bcebos.com/bba1cd11728b4710d6e18226cdcec3fdfd032309"/>
7、登录成功后，添加/修改乘车人，乘车人姓名和身份证信息即出现在下方，输入接收确认短信的手机号，在线选择座位，点击立即预订。
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https://iknow-pic.cdn.bcebos.com/a2cc7cd98d1001e91a826be5b60e7bec55e79799"/>
8、确认车次、座位信息，点击去付款，依据提示完成付款操作，即可在支付宝成功购买火车票。
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