The invention discloses an automobile bumper with an initiative collision avoidance function. The automobile bumper comprises a bumper shell, displacement sensors, an electromagnetic damping device and a controller. The electromagnetic damping device comprises a cylindrical guide seat, an electromagnet, a permanent magnet and an ejector rod, and magnetic pole directions of the electromagnet and the permanent magnet are opposite. Distance between obstacles and an automobile is detected by the displacement sensors, and when the detected distance is smaller than the preset distance in the controller, the controller controls the electromagnet to be electrified, and the electromagnet pushes the permanent magnet to move forwards so as to enable the ejector rod to extend out of the bumper shell, so that collision preparation can be made initiatively. During collision, the ejector rod overcomes mutual repelling forces of magnetic fields to retract so as to consume part of collision energy, and accordingly shock absorption and energy consumption are realized, and capability of the automobile bumper in protection of passengers and the automobile can be improved.