Hello, thanks for posting in English. It should be fairly simple to remove an app from your android phone. You can follow these steps:
Select the Settings app from your app drawer or home screen.
Tap Apps & Notifications, then hit See all apps.
Scroll down the list until you find the app you want to remove and tap it.
Alternatively, if you see the 'clean master' app on your homepage as an icon, you should be able to highlight it (it will begin to shake) and then you can move that to the rubbish bin. This may just remove the icon though, and I would follow the above steps to make sure its been removed.