Connection device of assembly type prefabricated laminated slabs

The invention provides a connection device of assembly type prefabricated laminated slabs. The connection device comprises an H-shaped steel beam, the assembly type prefabricated laminated slabs, toggle pins and cast-in-place concrete. The assembly type prefabricated laminated slab is formed by two times of casting, the manufacturing of a prefabricated layer is completed in a factory, then the toggle pins are welded to specified positions of the upper surface on a flange of the H-shaped steel beam, and then the product is transported to a construction site, the H-shaped steel beam and the assembly type prefabricated laminated slab with the finished prefabricated layer are installed and emplaced, a certain length of the principal rafter and bottom chord steel bars reserved by every two floor plates are connected in a welded, overlapped or banding mode, formworks are supported, and finally the concrete is cast in connection areas and laminated layers to complete the assembly of the connection device of the lami