In the article, it built the model of dimension optimization according to wide and narrow row separating planting mechanism;based on the motion path of wide and narrow row separating planting mechanism, reversed to seek the important dimension parameters of separating planting mechanism; the constraint conditions are a lot and complex, for solving it, it used Fmincon function of MATLAB to solve; and upgraded the optimization design to visual design system, it is easy to effectively extend for the method, an...