Hollow ultrahigh template section steel platform and construction method thereof

The invention discloses a hollow ultrahigh template section steel platform and a construction method thereof. According to the hollow ultrahigh template section steel platform, a template scaffold is erected on the section steel platform; the section steel platform comprises a transverse section steel beam, a longitudinal section steel beam, a scaffold board, a supporting scaffold and at least two lower template platforms with equal height; the two ends of the transverse section steel beam are respectively erected on the two contour lower template platforms and are fixed through an end fixing piece; the longitudinal section steel beam is vertically erected on the transverse section steel beam and is fixedly connected with the transverse section steel beam; the scaffold board is laid on a plane formed by crossing the longitudinal section steel beam and the transverse section steel beam; the supporting scaffold is supported below the plane; and the supporting scaffold and the lower template platforms are connected through tie rods. According to the section steel platform, the ultrahigh template scaffold is reduced into a single-layer height scaffold, a large activity space can be provided for a constructor, and the section steel platform is easy and convenient in construction and high in safety and can be widely applied to constructing a horizontal member at a hollow courtyard position.