The invention discloses a lifting and mounting method for multilayer cross arms on an overhead line pole and special tools for the method. The lifting and mounting method comprises the steps that a fixed pulley is hung and mounted on a cross arm on the top end of the pole, and a hanging rope winds around the fixed pulley; the cross arms are assembled on the ground and are connected with a bolt; the two ends of the two cross arms are connected by using special connecting ropes; the two cross arms are hung and conveyed to a mounting positions of the cross arms through the hanging rope and the special connecting ropes; the two cross arms are pushed into and fixedly clamped on the pole from one side of the pole; and ceramic pieces and hardware fittings are placed in a special storage box, thespecial storage box is hung and conveyed to positions of the cross arms through a down-pulling hanging rope and the special connecting ropes, and the ceramic pieces and the hardware fittings are mounted on the cross arms. The lifting and mounting method for the multilayer cross arms on the overhead line pole and the special tools for the method have the beneficial effects that lifting of the crossarms can be finished without participating of operating workers on the pole, after the cross arms are lifted in place, mounting of the two cross arms can be finished by one worker on the pole, the operating amount of the pole operating workers and labor intensity are reduced and relieved, operating time is saved, and operating efficiency is improved.