The invention discloses a pulling cable low-position assembly tool and an assembly method for a landscape lamp, and belongs to the technical field of tool assembly. The problems in the prior art thatlamp assembly is difficult with a high-position pulling cable and high in risk are solved. The pulling cable low-position assembly tool comprises a clamp, a positioning component and a moving component; the clamp is used for assembling the lamp; an inner frame is arranged at the center of the clamp and is matched with the lamp in shape; the positioning component is arranged at a low position of apulling cable and is used for preventing the clamp and the lamp from moving; one end of the moving component is fixedly arranged on the lamp, and the other end is arranged on the pulling cable; and the moving component is used for assembling and moving the lamp on the pulling cable. The pulling cable low-position assembly tool and the assembly method are applicable to low-position assembly of high-position puling cable lamps.