1、百度搜索输入“斗鱼TV”，点击打开斗鱼TV官网。
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2、进入斗鱼TV官网后，点击页面右上角的登录，输入账号密码，登录个人账号。
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3、登录好之后，找到想要知道直播时长的主播，进入他的直播间。
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https://iknow-pic.cdn.bcebos.com/63d9f2d3572c11dfef335f6f6e2762d0f603c298"/>
4、还没关注该直播间，就点击直播间的关注。
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https://iknow-pic.cdn.bcebos.com/d000baa1cd11728ba4346f6ec5fcc3cec3fd2c65"/>
5、最后把鼠标放在页面上方的关注，就可以看到该主播的直播时长了。
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https://iknow-pic.cdn.bcebos.com/d6ca7bcb0a46f21fdf88bd1ffb246b600c33ae3a"/>