Open steel box used for jacking and filling concrete cushion blocks

The invention discloses an open steel box used for jacking and filling concrete cushion blocks, comprising an open steel box, a stiffening steel plate and concrete blocks, wherein the open steel box consists of a sheet steel form shaped as a cuboid with one opened side; in relation to the bottom of an opening, the length or width of the open steel box is 3-20 times the vertical distance between the plane of the opening and the bottom; the stiffening steel plate is arranged in the open steel box and vertical to the bottom and divides the open steel box into a plurality of small chambers; and the concrete blocks are poured in the small chambers. When using the cushion blocks, the sheet steel form of the open steel box and the stiffening steel plate vertical to the sheet steel form can function in reinforcing and provide sufficient strength and hardness. Besides, the structure of the steel box that is only opened at one end and formed by the sheet steel form effectively prevents the problems of colliding and cru