i have changed my apple id email address to different emaildifferent and changed the password also and i have upgrade my phone tando ios11 and when i type my new email and password it refuses to let me enter my phone

Good morning muna248!
It sounds like you're having some trouble logging into your Apple ID after changing your email address. I'll be happy to help out.
Make sure there are no issues with the account by signing in with your Apple ID and password on the official Apple ID website: Manage your Apple ID
Since you've recently changed your Apple ID email address, you'll want to follow these instructions to log in: What to do after you change your Apple ID or password

Take care!