The invention provides an assembly tool for an elevator, and belongs to the technical field of elevator installation auxiliary equipment. The assembly tool for the elevator is designed to solve the problem that existing positioning between an elevator safety gear and a vertical beam and between a guide shoe base and the vertical beam is inaccurate. The assembly tool for the elevator comprises a first positioning plate, a second positioning plate and a third positioning plate, wherein the second positioning plate and the third positioning plate are formed in a mode of outwards extending from the two ends of the first positioning plate. The second positioning plate comprises a guide shoe positioning plate and a safety gear positioning plate, wherein the guide shoe positioning plate and the safety gear positioning plate are used for accurate positioning between a guide shoe of an elevator and the vertical beam and between the safety gear of the elevator and the vertical beam. The assembly tool for the elevator can improve the accuracy and the reliability of positioning between the elevator safety gear and the vertical beam and between the guide shoe base and the vertical beam, and improve the safety factor of the elevator.