The invention discloses a wire pulley crossing rescue method for electric transmission lines. the method solves the problem that the rescue difficulty is high when staff working high above the groundfall down. By dragging pulleys to transversely drag and guide trapped staff to pole towers or a portion capable of descending, the trapped staff can be evacuated downwards to the ground. According tothe technical scheme, an application for powering off the rescued lines is delivered to a dispatch center, electricity verification is carried out on the pole towers at the two ends of a rescued roadsection, and permanent grounding lines are installed on the rescued road section; rescue equipment is conveyed to the pole tower closest to the positions of the trapped staff, and an operation protection station is arranged on the pole tower; first sliding pulleys are arranged at the places where wires are located and above the trapped staff to create connection between the trapped staff and the first sliding pulleys; traction ropes are dragged to the places where insulating rods are located, and second sliding pulleys stride over the insulating rods and are arranged on the wires to create connection between the trapped staff and the second sliding pulleys; the traction ropes are dragged to guide the trapped staff to a descending point, and the trapped staff are descended to the ground from the descending point; the grounding lines are dismantled, the staff are evacuated, and an application for recovering power supply is reported to the dispatch center.