i need help to unlock my iphone my daughter try to many wrong passcodes

You will need to reset that passcode since the iPhone, by now, has been disabled. You can reset your passcode by following the instructions in this article by Apple ➔ How to reset your passcode on a disabled iPhone. You will need a computer for this task and all your data on your iPhone will be wiped clean in the process.

Axel F.

See this for a forgotten passcode. If you forgot the passcode on your iPhone, or your iPhone is disabled - Apple Support

Understand to do this, you have to restore the phone which will wipe it. You can restore to her last backup, but if she has not been backing up regularly, or does not have a backup at all, she will lose all of her content. And, before you ask, no there is no other way, or a way to save the content now that she has forgotten the passcode.