To solve the problem of insufficient crossing distance of overhead lines, the current power grid mainly adopts coating insulation layer on the outer surface of bare wires to achieve the purpose of line protection. However, the existing coating robots have large volume and weight, and there are problems such as insufficient climbing and braking capabilities. This article will improve the existing insulation coating robot technology, develop a compact and lightweight bare wire live insulation coating robot, reduce the volume and weight of the robot, achieve lightweight, and enable it to adapt to scenes where the distance between wires is relatively small, the distance below trees is close, the wire diameter is small, and the span is large. It will increase the climbing and braking capabilities of the robot, so that it can adapt to shuttle between mountains and forests with sloping lines, Increase the robot’s span crossing ability, further improve work efficiency by increasing its battery life and operating mileage, and achieve the goal of expanding application scenarios.