In this paper , according to work environment of trainsport plane , taking advantage of optimal matching between engine and transmission parameters improve performance of trainsport plane . and making design process is more strictly buy introducing design eidos of automobile . this paper provided design basis for improving design level of trainsport plane 本文根据拖拉机变型运输机的工作环境，通过对传动系参数的优化匹配，提高了拖拉机变型运输机的动力性和经济性，并在设计过程中引入了汽车的设计理念，使设计过程更加严谨，为提高拖拉机变型运输机的设计水平提供了参考的依据。
