i have forgotten my password on my iphone 7 and my next solution is erassing my phone without itune help...

Sorry no. You need a computer running iTunes to remove your passcode, as per this support article:--> If you forgot the passcode for your iPhone, iPad, or iPod touch, or your device is disabled

or, taking a look at this support video:

https://www.youtube.com/watch?v=7s8-zLG9ySQ

Regards

Giulio

Do you mean Passcode?

You need a computer to follow these steps. If you don't have a computer, borrow one from a friend. There is no other way.

Click->If you forgot the passcode for your iPhone, iPad, or iPod touch, or your ...

Click->If you forgot the answers to your Apple ID security questions - Apple ...

Click->If you forgot your Apple ID password - Apple Support

Click->If you forgot your Apple ID - Apple Support

Use this link If you forgot your Screen Time passcode - Apple Support