You can connect your Instagram business account to the Facebook page you manage to access the additional features of Instagram, Facebook, and SocialWeaver together. If you have a personal Instagram account, take a look at How to convert your personal Instagram account to a business account.
To connect your Facebook page to an Instagram account:
Using your Instagram mobile application, go to your profile, and click the “Menu” button on the top right corner.
2. Choose the “Settings” option.
3. Click on “Account”.
4. Click on “Sharing to Other Apps” and choose “Facebook”.
5. Choose the Facebook page that you want to connect to this Instagram business account. Make all the necessary changes to the settings on this page.
For more information visit How do I share posts from my Instagram account to a Facebook Page that I manage.