The paper designed a group control system of tractor based on ultrasonic positioning technologies. A driver could operate several agricultural vehicles that less labour needed. The efficiency and precision of the agricultural production could be enhanced using the group system. 本文旨在开发一种基于超声波定位技术的农用拖拉机群控制系统,实现一个驾驶员可以同时操控数台拖拉机,减少人力资源的投入、提高工作效率和作业精度的目的。