Laminated slab positioning support and slab joint mold sealing device for fabricated building

The utility model discloses a laminated slab positioning support and slab joint mold sealing device for a fabricated building. A plurality of groups of supporting components are transversely arrangedbetween a prefabricated main beam and a prefabricated secondary beam; wherein the end head supporting components of which the two ends are in contact with the prefabricated main beams are arranged onthe prefabricated main beams on the two sides; the middle supporting component located in the middle is transversely arranged between the prefabricated secondary beams, and the two ends of the middlesupporting component are installed on the inner side faces of the prefabricated secondary beams. A plate seam formwork is arranged between each set of middle supporting components in a lap joint mode,the distance between every two adjacent sets of supporting components is smaller than the width of one laminated plate, and the laminated plates can be transversely laid and placed between every twoadjacent sets of supporting c