支付宝设有三种形式的密码。分别是支付宝登录密码，支付宝支付密码和支付宝APP解锁密码。
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支付宝的登录密码指的是支付宝在移动端，电脑端登录个人账号时，需要填写的密码。这个是每个支付宝用户在注册时都要进行设置的。
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支付宝的支付密码指的是在使用支付宝进行交易，付款，转账等等资金流动行为时，需要填写的密码。这个密码可以在注册时填写，也可以注册成功后填写。
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支付宝的解锁密码指的是移动端上的解锁。例如平板电脑，手机。这是用于对手机支付宝APP软件的加密。如果没有密码，别人是无法打开用户手机上的支付宝APP。
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参考资料：/baike.baidu.com/item/%E6%94%AF%E4%BB%98%E5%AE%9D/496859?fr=aladdin"target="_blank"title="支付宝">支付宝