In this paper, the high-altitude fully-automated wiring device design is performed according to the maintenance requirements of high-altitude operation of the power grid. The design of the robotic arm function of the high-altitude automatic wiring robot and the realization of the wiring function are introduced.The design of the high-altitude automatic wiring robot is mainly composed of two major modules, including mechanical arm design and insulation design.The priority-based immediate preemption algorithm based on JIT is used to process multi-tasking in real time in order to improve processing efficiency and intelligent human-machine interaction. Module.Through on-site testing, it was confirmed that the system can perform real-time maintenance in an orderly and efficient manner according to the task program. Compared with the traditional manual wiring, the high-altitude automatic wiring device has the advantages of high efficiency and good safety.