The invention discloses a prestressed component extrusion forming device. The device comprises a base plate and an extrusion mold, wherein the base plate comprises a main frame and a first driving assembly, the main frame is provided with a plurality of traveling wheels, and the first driving assembly is connected with at least one of the traveling wheels and is used for driving the main frame totravel in the transverse direction; and the extrusion mold comprises a mold frame, a plurality of augers and a second drive assembly, the mold frame is connected within the main frame, the plurality of augers are rotatably connected in the mold frame and are arranged at intervals along the longitudinal direction of the mold frame to form an extrusion space, the second drive assembly is connected with the plurality of augers and is used for driving the plurality of augers to rotate, wherein the mold frame is provided with a discharging port communicating with the extrusion space. The device ishigh in production efficiency, simple in procedure, free of manpower, reduced in production cost, and high in product quality reliability.