On the base of thoroughly studying dynamic characteristic of tractor - implement combination , a control project of three parameters was put forward in the paper . the three parameters were engine load rate , drive wheel slip and work resistance . an integrated control model based on three parameters was established , which reflects colligated dynamic character of the unit 拖拉机作业机组中，很多参数存在着耦合作用，给综合控制带来一定的难度，本文在深入研究机组动态特性的基础上，提出了发动机负荷率、驱动轮滑转率和作业阻力三参数的综合控制方案，它反映了机组的综合动态特征，并建立了基于这三参数的综合控制模型。
