If you've created a second Blog page, you can move items from one blog to the other as follows:
In the Home Menu, click Pages.
In the Pages panel, select the page containing the content you're moving.
Press and hold Shift and click the item or items you want to move.
In the action bar at the bottom of the panel, click Move. The Move button only shows if you have at least one other pageof the same type.
In the Select Destination Collection window, select the page where the content will go.
Click Move Items. The select and move options might look different depending on the page type.
For more information see: Moving collection items between pages.