Cross arm mounting operation auxiliary equipment comprises a battery pack and a remote control and further comprises a control module, a communication module, a sensor module, an upper moving device,a state LED lamp, an elastic traction layer, a lower moving device and an action module. The control module is electrically connected with the battery pack; the communication module is electrically connected with the remote controller; the sensor module is electrically connected with the control module; the upper moving device is welded to the elastic traction layer; the state LED lamp is electrically connected with the control module; the elastic traction layer is welded to the lower moving device; the lower moving device is electrically connected with the action module; and the action moduleis electrically connected with the control module and the upper moving device. The upper moving device comprises upper hoops, upper springs, position-adjusting pipes, an upper hoop opening-closing rotating shaft, an upper closed lock, hand-pulled adjusting rings, a displayer, upper anti-skid rubber strips and an upper bracket. The upper hoops are welded to the upper springs; the upper springs arewelded to the hand-pulled adjusting rings; the position-adjusting pipes are welded to the upper hoops and the hand-pulled adjusting rings; the upper hoop opening-closing rotating shaft and the upperclosed lock are mounted on the upper bracket; the hand-pulled adjusting rings are welded to the bracket; the displayer is electrically connected with the control module; the upper anti-skid rubber strips are clamped on the hoops; and the upper bracket is welded to the elastic traction layer.