In order to solve the shortcomings of the first generation and the second generation of steel truss floor support plates, such as the smaller net height of buildings, engineers developed the third generation of steel truss steel bearing plates. The third generation of floor support plates is to change and reduce the convex and high-pressure type of the original floor support plates, and the steel bars in the floor are processed into steel bars trusses by semi-automatic sheet metal welding equipment in the factory, so as to replace the convex height and bearing plate of the floor Carrying capacity. After welding, silane, pure manganese phosphating, water washing, drying, galvanizing and other rust removal and anti rust environmental protection technologies are used to connect the steel truss and floor support plate in the factory with high frequency resistance welding. The formwork system combines the reinforcement in the concrete floor slab with the construction formwork to form a load-bearing component which can bear the dead weight of wet concrete and construction load in the construction stage, and the component can be used as the lateral support of steel beam in the construction stage. In the use stage, the steel truss and concrete work together to bear the service load.1. The stress mode and combination mode of the truss floor are reasonable, and the cast-in-place concrete is rigid as a whole, so the construction and use of the two-way slab can be easily completed. However, the lower skin of the ordinary profiled slab is perpendicular to the direction of the rib, and the reinforcement cannot be located.