Wiper protection device and control method thereof

The invention discloses a wiper protection device comprising a central control module, a first four-position plug connected with the central control module and terminals which are connected with the central control module and correspond to each wiper, and the terminals are fixed on wiper arms of the wipers. The device can lead the central control module to not only judge whether a rocker arm of each terminal is driven to the corresponding position or not, but also detect the position located by each rocker arm in a real-time manner during the driving process and emit warning information to an electrical system of a motor vehicle when the rocker arms can not be driven into place due to mechanical failure by using a closed-loop control system.