The invention discloses a method for clearing steel billets during overhauling of a pusher heating furnace. The method comprises the steps that (1) a drag hook and a steel wire rope are firstly placedin the furnace and are connected together; (2) a fixed pulley is fixed to a fixed check block of the discharge end of the heating furnace through the steel wire rope; (3) after penetrating through the fixed pulley, the steel wire rope is hung on a crane hook; (4) after the drag hook is hung on the steel billets, the crane hook is lifted, and the steel billets move outwards along a sliding block on a longitudinal supporting beam; (5) after being pulled out of the heating furnace, the steel billets slide onto a furnace delivery roller bed along the sliding block on the supporting beam and a lower sliding plate at the discharge end, a rotating motor of the furnace delivery roller bed is started, and the steel billets are transported away; and (6) after the steel billets are cleared, the fixed pulley and the fixed check block are disconnected, and clearing operation of the steel billets this time is achieved. The method is simple, quick, safe, reliable and practical, clearing time of thesteel billets can be greatly shortened, and construction efficiency is greatly improved.