A deformed eccentric noncircular gears was presented. The seedling transplanting mechanism, sending seedlings, transplanting, and the return time were redistributed by using deformation characteristics, which reduced the seedling needle relative velocity. Transplanting institutions kinematics analysis and a mathematical model were built. Simulation software, motion analysis and optimization program were developed with the application of VB programming language. The bodies of various sportsdrop features and optimization results were displayed on program interface, which greatly improved the efficiency of humancomputer interaction, easily got a quick group of optimal data, and improved the success rate of the machine development.