Follow the Instruction for How to Pin your Post on Facebook Timelin.
- Log into your Facebook account
- Go to the post on your Page's Timeline.
- Choose which post you want to see on the top position on your timeline.
- Hover over the top-right corner of the post and click yellow arrow.
5)- After click the arrow, then select "Pin to Top".
Now you see that which post you have pinned, that is shown top position on your timeline.