Abstract: This article mainly elaborates on the design of a detachable and retractable electric manhole cover lifting device, Its main function is a modular electric manhole cover lifting tool that can be disassembled, grounded, and retracted, It can comprehensively improve the convenience of cable maintenance for power enterprises and improve the efficiency of actual construction, It can also shorten the repair time, To further reduce the time of power outage, the most important thing is to reduce the risk of cable manhole cover opening, effectively solve the problem of cable manhole cover opening, greatly improve the safety of staff, and have high promotion value.