The invention discloses a multi-level warning system of an electric automobile encountering a pedestrian or a rider. The multi-level warning system comprises a pedestrian or rider detecting unit, a distance measuring unit, an automobile-condition detecting unit, an environment noise detecting unit, a central processing unit and a voice-warning control unit; the pedestrian or rider detecting unit is used for detecting whether the pedestrian or the rider appears near the electric automobile or not; the distance measuring unit is used for measuring the distance between the automobile and the pedestrian or the rider; the automobile-condition detecting unit is used for collecting the operating condition of the automobile; the environmental noise detecting unit is used for collecting an environmental noise signal; the central processing unit is used for conducting judging and decision-making, the central processing unit is used for judging whether the pedestrian or the rider is detected around or not, meanwhile, according to the relative distance measured by the distance measuring unit and a relative speed, judging a current danger level through combining the automobile-condition detecting unit, and transmitting the danger level and the environmental noise signal to the voice-warning control unit; and the voice-warning control unit is used for deciding the size and the type of a voice-warning signal sent at the present through combining the two types of signals, and controlling an external voice broadcasting device or an internal voice broadcasting device to broadcast a warning voice.