Large plate ingot rectangular casting machine

The utility model relates to the technical field of aluminum ingot casting equipment, in particular to a large plate ingot rectangular casting machine which comprises two chain type conveying mechanisms which are oppositely distributed in a spaced mode and opposite in conveying direction, two sets of fixed rails are arranged between the two chain type conveying mechanisms in a spaced mode, and the direction of the fixed rails is perpendicular to the conveying direction of the chain type conveying mechanisms. Each group of fixed rails is provided with rail transport trolleys which are tightly arranged, and aluminum ingot casting molds are placed on the rail transport trolleys; a plurality of sets of movable rails consistent with the fixed rails in direction are arranged on conveying chains of the chain type conveying mechanism, the movable rails on the upper-layer conveying chain and the fixed rails are located on the same horizontal plane, and a telescopic mechanism opposite to the rail conveying trolley is a