Prefabricated exterior wall scute

The utility model discloses a prefabricated exterior wall scute, including the scute body, a plurality of first spread grooves have been seted up to one side of scute body, and one side welding that first spread groove was kept away from to the scute body has a plurality of first connecting blocks, first spread groove and first connecting block looks adaptation, the second spread groove has been seted up to the bottom of scute body, and the top welding of scute body has the second connecting block, second spread groove and second connecting block looks adaptation, all offered the locating piece groove on the inner wall of first spread groove both sides, the welding is kept away from on the inner wall of open -ended one side in the locating piece groove has a location spring, and the one end welding of location spring has a location slider, and the stopper has all been welded to the both sides of location slider, it has spacing support all to weld on the inner wall of locating piece groove both sides, stopper