Adjacent to the stage building entrance, it is a device specifically designed to change the size of the stage entrance, consisting of upper and side panels. Compared with traditional fake platform entrances, it eliminates the hanging function of lighting fixtures and independently divides the hanging function of lighting fixtures into column light frames and light suspension rods located between column light frames, thereby solving the problem of inability to set top lights below the upper area of traditional fake platform entrances and improving the efficiency of the front area of the main stage.