The invention belongs to the technical field of building products, and in particular, relates to a PC wallboard mold with a window hole module. The mold comprises four inner wall edge molds and positioning pieces; U-shaped positioning grooves are concavely formed in the mold cavity surfaces of the inner wall edge molds; positioning arm grooves are concavely formed in the long edge sides of the positioning pieces; and the positioning pieces are fixedly inserted in the U-shaped positioning grooves. The mold further comprises the window hole module; the window hole module is divided into four sets of angular end submolds and two sets of straight edge submolds; and the cross sections of the inner wall edge molds are L-shaped. The mold further comprises a positioning circular plate and a pipe sleeve; a pressing plate is placed on the top end surface of the pipe sleeve; and the pressing plate and the pipe sleeve are tightly pressed on the positioning circular plate by fastening screws. The mold has the advantages of simple mold disassembly, convenient and fast operation and low manufacturing cost, can realize prefabrication of a reinforcement skeleton and overall mold insertion operation when guaranteeing once casting formation of window holes, and can greatly improve the manufacturing quality and efficiency of prefabricated walls.