Method and system for testing endurance mileage of electric vehicle

The invention discloses an electric vehicle endurance mileage test method and system, and the method comprises the steps: debugging a vehicle to a preset state, and controlling the vehicle to maintain a preset speed of a preset time; the electric quantity of the vehicle is charged to be full, then the electric quantity of the vehicle is quickly consumed, and when the electric quantity of the vehicle is consumed to a first electric quantity threshold value, the vehicle is controlled to keep a preset speed; when the electric quantity of the vehicle is consumed to a second electric quantity threshold value, starting to record the driving mileage of the vehicle until the vehicle cannot maintain the preset speed to obtain the rear-end driving mileage; the average discharging power of a battery pack of the vehicle and the charging electric quantity for charging the electric quantity of the vehicle to the full electric quantity are obtained; obtaining the whole vehicle energy consumption efficiency of the vehicle ac