Abstract: A ultrasonic voice location system based on Single Chip Microcomputer is presented in this paper.By using multi-channels circuit of measuring distance,the precision and stability of this system is improved greatly,and the feasibility of omnidirectional vehicle obstacle avoidance may be realized. The application of ultrasonic sound system of measuring distance is also presented in this paper . Key words:Ultrasonic, Voice location, Vehicle Obstacle Avoidance