A fully-automatic dust proof system for quick change connector of electric vehicle is provided. The fully-automatic dust proof system of the application comprises: a base provided at the quick change connector of the battery pack; a dust proof covering plate slidably installed onto the base; an electric motor fixed on the base; a power supply electrically connected with the electric motor; a control system for controlling the motor to drive the dust proof covering plate to slide; a distance sensor for monitoring relative distance between the battery pack and the electric vehicle; and a pressure sensor for monitoring whether the dust proof covering plate is in place or not.