Being marked with cat marks on the car door not only causes economic losses to the owner, but also damages the appearance of the vehicle and affects its service life and market value. Therefore, it is recommended that car owners choose a safe and bright parking lot when parking, and try to avoid parking in remote and sparsely populated places. At the same time, we should pay attention to vehicle maintenance and anti-theft measures, and install body monitors, anti-theft devices and other devices to prevent vehicles from being stolen or destroyed.