支付宝绑定的手机号可以更改，修改方法如下：

1、顺序在手机上找到并打开支付宝客户端。

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2、然后进入到支付宝页面中，选择“我的”，接着在页面右上方选择“设置”选项，点击进入。

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3、在设置页面中，选择红色箭头所指处的“安全设置”选项。

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4、接下来进入到安全设置页面中，选择列表中的“手机号”。

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5、然后在页面中选择更换手机号即可，接下来根据提示操作即可。

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