Novel construction method for steel structure floor support plate

The invention relates to a novel construction method for a steel structure floor support plate. A bottom die, a bottom die recovery type steel bar truss floor support plate clamp structure and a leveling-free high-precision cast-in-place ground one-time pouring forming structure are included. Comprising the steps that a steel bar truss of the floor support plate is manufactured, a bottom die is manufactured, and holes are formed in the bottom die; the bottom die recovery type steel bar truss floor support plate clamp structure is assembled, a leveling-free high-precision cast-in-place ground one-time pouring forming structure is arranged above a steel bar truss of a floor support plate, pouring of the floor support plate is conducted, and external clamps and connecting hole plugging components are recovered. The method has the beneficial effects that the bottom die and the steel bars are stably connected with the steel bar truss and the bottom die through the detachable clamps, the bottom die can be recycled