An electric bed frame for connection with a bed frame includes a fixed rack, a movable rack, a hitching bracket and a fastener. The fixed rack has a through hole. The movable rack is movably attached to the fixed rack. The hitching bracket has a striding portion for being disposed on a side rack of the bed frame, and an extended portion extended from the striding portion and having a groove. The fastener is inserted through the through hole of the fixed rack and the groove of the hitching bracket for connecting the hitching bracket with the fixed rack. As a result, the user has no need to throw away the normal bed existing at home and buy a whole new electric bed, and can enjoy the lifting and lowering effect like the electric bed on the existing normal bed.