Disclosed is a wall pre-buried line box one-step installation mold. The mold comprises a mold box and a module. The mold box comprises a frame with an upper opening and a lower opening, a line box frame is arranged at the portion, close to the end face, inside the frame body, and the line box frame is matched with the pre-buried line box in size; a threading hole is formed in the line box frame, asleeve is inserted into the threading hole, the module is a concrete block, and the concrete block is poured and formed inside the frame. According to the wall pre-buried line box one-step installation mold, by arranging the mold box and the module, the line box can be installed in a wall building process, and the stability of the pre-buried line box and the position accuracy are improved.