Abstract: This paper analyzes the development status of Raphanus Sativus in China, and makes a comparative study on the performance of existing commonly used models. In order to improve the mechanized harvesting efficiency of Northeast Raphanus Sativus, this paper designs a Digging Raphanus Sativus harvester combined with the Raphanus Sativus’ s planting mode and harvesting process. The harvester is mainly composed of disc cutters, excavating picking rollers, auxiliary picking rollers, conveying and cleaning mechanisms and other parts. During the work,the harvester can separate the stems and leaves of the Raphanus Sativus from the roots, and complete operations such as digging, soil removal and fruit collection of Raphanus Sativus. Based on Mathematical modeling and mechanical analysis of the digging and picking mechanism, it is determined that the rotation speed of the digging and picking roller is180 r/min and the speed of the auxiliary pick-up roller is 270 r/min.The research and development of this harvester provides a reference experience and methods for the harvest of other rhizome crops.