Prefabricated concrete reverse ridge for composite floor slab construction

The utility model discloses a precast concrete reverse ridge for composite floor slab construction, which comprises a composite floor slab, a groove is arranged at the top end of the composite floor slab, a plurality of reverse ridge precast slabs which are uniformly distributed are arranged in the groove, the reverse ridge precast slabs are all contacted with the inner wall of the groove, the inner wall of each reverse ridge precast slab is provided with a sliding chute I, and the sliding chutes I are communicated with the groove. First sliding blocks matched with the first sliding grooves are arranged in the first sliding grooves. The device has the beneficial effects that the reverse ridge prefabricated plates are symmetrically arranged in pairs and make contact with the inner walls of the grooves, the adjusting mechanism composed of the first sliding groove, the first sliding block, the first movable rod and the second movable rod is arranged, the device can adapt to grooves of different widths, meanwhile