Tank type modularization factory prefabricated steel structure stairs

The invention discloses tank type modularization factory prefabricated steel structure stairs including a support main body, benches, and platforms. The support main body includes a plurality of horizontal support columns, and a plurality of vertical support columns fixedly connected with the horizontal support columns, the benches and the platforms are arranged in an inner space formed by connecting the horizontal support columns and the vertical support columns, and platforms are located between two continuous benches. According to the stairs, the horizontal support columns and the verticalsupport columns are adopted to form the support main body, the benches are erected in the support main body, and the platforms are connected between the two continuous benches so that a whole stair structure is formed. The stairs is simple in structure and convenient to assemble, assembly can be finished at a manufacture place, the stairs can be transported to a mounting place to mount after finishing manufacture, and ano