Q: As my son made my I cloud new adress,for connecting he has give his e mail adress.and now I have forgot my I cloud password,wenn I try to reset apple sport send to his e mail adress.how can I chage it?

Welcome to the Apple Community.

Firstly, you need to change your details with Apple,  Start here, change your country if necessary and go to manage your account. You may have already done this.

In order to change your Apple ID or password for your iCloud account on your iOS device, you need to delete the account from your iOS device first, then add it back using your updated details. (Settings > iCloud, scroll down and hit "Delete Account")

Providing you are simply updating your existing details and not changing to another account, when you delete your account, all the data that is synced with iCloud will also be deleted from the device (but not from iCloud), but will be synced back to your device when you login again.

If you mean his password, then he needs to reset it at...

iForgot.com