Abstract: According to the agronomic demand of narrow-wild rice planting, a kind of inclined narrow-wild rice transplanting mechanism was designed to transplant rice in narrow-wild rows. A helical gear transmisson mechanism with intersecting axles was employed. In addition, it came true without changing rice seeding raising process and raising tray. But there were several problems when the rice transplanting mechanism picked rice seeding, in order to solve the problems, an innovative planting arm that picked the rice seeding vertically was proposed. The mechanism analysis of transplanting mechanism and theoretical analysis for changing planting arm by matrix method were also conducted. As a result, parameters of narrow-wild rice transplanting mechanism composed by helical gear transmission with intersecting axles were calculated: The optimum slant angle (γ) was 9.89°, the regulating angle (δ1) of planting arm was 6.79°, and angle (δ2=γ) between seedling-needling plane and horizontal plane was 9.89°. At last, the correctness and feasibility of this design were verified by adopting virtual testing.