Tobacco seedling planting machine is the core of tobacco transplanting machine,whose design is offset double working principle of the four connecting rod rotating disc,and suitable for pot seedling planting and floating seedling.It is found that factor lambda > 1 is the basic foundation of planting apparatus design and ensure the quality of transplanting and the necessary condition of normal work by analyzing the characteristic of the known movement of tobacco seedling transplanting.At the same time,different planting speed and depth of the orthogonal experiment determines the specific value o...