Altering your email is normally not a big deal, however when it concerns Facebook, it's a bit more complex due to the fact that your e-mail address is also your Facebook login mail ID. You can alter your login mail ID on Facebook by browsing to the Facebook settings page and verifying your new email address.
How To Change Facebook Primary Email
1. Search to Facebook.com and log in to your Facebook account
2. Click the "Account" button on top right corner of the screen. Click "Account Settings."
3. Scroll down to your email address and click the "Edit" icon.
4. Click "Add another email."
5. Enter your brand-new e-mail address into the "Email" field and click "Conserve Modifications."
6. Input your Facebook password when prompted to validate the modifications.
7. Visit to your e-mail account and open the confirmation message from Facebook. Click the "Confirm" button within the message.
8. Click "Account," then "Account Settings." Click "Edit" next to "Email." Click the "Remove" button for your old email address to complete the process of altering your login mail ID on Facebook.
And one more thing please don’t forget to share this awesome trick to use the How To Change Facebook Primary Email with your friends.