Stable fabricated composite floor slab

The utility model discloses a stable assembly type composite floor slab which comprises a prefabricated slab, a plurality of laying brackets are arranged at the top end of the prefabricated slab, each laying bracket comprises two U-shaped irons, the same stand column is welded to the bottoms of the two U-shaped irons, and longitudinal steel bars are erected in the multiple laying brackets in the same longitudinal column. Transverse steel bars are erected in the multiple laying brackets in the same transverse row, a plurality of lifting frames are arranged on the top of the prefabricated plate, a concrete layer is poured on the top of the prefabricated plate, a plurality of external connection frames are arranged on the periphery of the prefabricated plate, and a plurality of embedding grooves are formed in the periphery of the top end of the prefabricated plate of the external connection frames. A plurality of transverse steel bars and longitudinal steel bars are erected in the laying bracket, the bottoms of