To improve the quality and meet the requirements of sowing and planting, the production testing and demonstration have been done for stubble-mulch rotocultivator for boat tractor in different paddy fields with multiple rice cropping system. By upgrading core technology and integrating matching technology in the production testing and demonstration process, the technical and economic indexes of stubble-mulch rotocultivator for boat tractor have met expectations, a new conservation tillage technology for rice production mechanization has been formed and it has been used to achieve moderate tillage and stubble-mulch returning. A kind of mechanization technology system for cultivating, seeding and harvesting of paddy has been created, and it uses the stubble-mulch rotocultivator for boat tractor as the prime technological device.