The working characteristics of walking type transplanting mechanism used in wide-narrow row planting was described. According to its characteristics, the planetary gear train with two levels of crisscross shaft was used in walking type transplanting mechanism and a transplanting mechanism used in walking type transplanter was proposed. The structure features and working principle of the wide-narrow row transplanting mechanism was analyzed. The angular displacement and the influence of the gear spiral angle. The kinematic model of the transplanting mechanism was built in the space coordinates system, and the displacement equation of the seedlings tip point was got. The parameters were analyzed and optimized by programming. The virtual model of the proposed transplanting mechanism was built with the optimization parameters. The theory model was verified by simulation and experiment. This transplanting mechanism could realize wide-narrow row rice. 