The invention discloses fabricated wall plates and a connecting structure thereof, and relates to the technical field of the building wall plates. The fabricated wall plates and the connecting structure thereof comprise a plurality of wall plate units; each wall plate unit comprises the two wall plates and a heat preservation layer, the every two wall plates are symmetrically arranged on the two sides of the corresponding heat preservation layer, and each heat preservation layer is connected with the corresponding wall plates on the two sides through first connecting pieces; the end face of each wall plate unit is provided with a protective structure, the end faces of adjacent wall plate units are connected through H-shaped steel, and flanges of the two sides of each H-shaped steel makes contact with the wall plates of the corresponding wall plate unit; and by arranging connecting screw rods to penetrate through the flanges of the H-shaped steel and the wall plate units, the wall plateunits and columns or structural columns as well as beams or floor slabs are connected and fixed through the connecting structures. According to the fabricated wall plates and the connecting structurethereof, the two wall plates are connected and fixed through the first connecting pieces, and the heat preservation layer is filled between the every two wall plate, the overall strength is ensured,meanwhile, excellent thermal insulating and heat preservation performance is ensured, and consumption of building energy sources is reduced; and the wall plate units and the columns or the structuralcolumns as well as the beams or the floor slabs are connected and fixed through the connecting structures, the repeated utilization rate is improved, and the cost is reduced.