Prefabricated part connecting structure

The utility model relates to a prefabricated part connecting structure which comprises two prefabricated part bodies which abut against each other, concave water blocking grooves are formed in the positions, close to a connecting seam, of the surfaces of the prefabricated part bodies respectively, the extending direction of the water blocking grooves is kept consistent with the extending direction of the connecting seam, and water blocking strips are installed at the water blocking grooves. The two end parts of the water-blocking strip are respectively clamped in the water-blocking grooves, and the middle part of the water-blocking strip covers the joining seam; water stopping teeth are arranged on the surface of the prefabricated part body between the water stopping grooves and the joining seams, and tooth grooves meshed with the water stopping teeth are correspondingly formed in the water stopping strips; the water blocking screws penetrate through the water blocking strips from outside to inside and are fi