With a large working height and extension range. The working height of modern aerial work vehicles can reach tens of meters or even hundreds of meters, which can meet the needs of aerial work in various high-rise buildings, bridges, power facilities, etc. The working arm can be extended in various ways, including a combination of telescopic, folding, rotating and other actions, which can flexibly adjust the position of the working platform, so that the operator can accurately reach the working point, reduce the preparation time for the operation, and improve work efficiency.