Steel structure board room capable of being quickly disassembled and assembled

The utility model discloses a steel structure board room capable of being quickly disassembled and assembled, which comprises a top wall and a bottom wall which are horizontally arranged, and further comprises a front wall and a rear wall which are respectively hinged to the front side edge and the rear side edge of the bottom wall, and a left side wall and a right side wall which are respectively hinged to the left side edge and the right side edge of the bottom wall, the left ends of the two rotating shafts located on the left side of the front wall and the left side of the rear wall respectively are fixedly connected with two idler wheels respectively, and the right ends of the two rotating shafts located on the right side of the front wall and the right side of the rear wall respectively are fixedly connected with the other two idler wheels respectively. The rollers are in rolling connection with the bottom of the top wall in the front-back direction. When the board room is unfolded, the top wall is pulle