The utility model discloses a furnace stay, furnace door frame that hanging beam reached based on this hanging beam change system, this hanging beam include parallel arrangement's first, second girder, and girder both ends symmetry sets up the end plate of connecting two girders, and first girder is stretched out to the upper end of end plate, and the upper end of one of them end plate sets up first cardboard, and first cardboard is parallel with the girder, forms first U -shaped draw -in groove, set up L shape cardboard on another end plate, the card is in the upper end of another end plate,with the third U -shaped draw -in groove of first girder formation with first U -shaped draw -in groove opening opposite direction, set up fixing bolt between L shape cardboard and the end plate, U -shaped draw -in groove block is fixed this hanging beam on measureing at the unsettled beam end in both ends. This hanging beam can be used to the occasion that industrial inconvenient crane got into,and the installation is simple, practices thrift space and cost. This hanging beam is used for coke oven furnace door frame, furnace stay dismantlement in -process to hoist, has avoided adopting askewthe drawing of large -scale crane and has hung to one side, is favorable to the safety work.