With the rapid development of the power grid, multiple transmission lines in the same tower are widely used, which can reduce the comprehensive cost and the demand of the line corridor, but also increase the probability of power outage maintenance operators mistakenly boarding adjacent live lines, resulting in electric shock casualties. In view of this situation, this paper puts forward a kind of anti-error boarding device installed on the pole tower, which has the function of wireless communication and background management system. When the line is live, the anti-error boarding device is locked, which can effectively prevent the operator from straying into the live side. When the line has a power outage maintenance task, the device is unlocked. The device forces operators to work in accordance with established safety procedures, which can effectively avoid safety accidents and provide safety guarantee for power maintenance operators.