Safe and practical tread board for realizing simple and convenient disassembly and assembly of temporary staircase in construction site

The invention relates to a safe and practical tread board for realizing the simple and convenient disassembly and assembly of a temporary staircase in a construction site, comprising a tread steel board and steel tube rings, wherein the outer side of the tread steel board is turned downwards, the inner side of the tread steel board is turned upwards, and one steel tube ring used for penetrating in a tread steel tube is welded at each of the both sides of the back surface of the tread steel board respectively. The tread steel board is a steel board with patterns which are 3 mm thick, as well as is 900 mm long and 250 mm wide. The inner side and the outer side of the tread steel board are turned upwards by 30 mm and turned downwards by 30 mm respectively. The two steel tube rings on the back surface of the steel board have a diameter of 50 mm. According to the invention, the tread steel board which is convenient to disassemble and assemble is additionally arranged on the basis of the original temporary staircas