Abstract: In order to achieve potato harvest and mulch film recovery, based on embedded technology, potato harvester was desgined. The impacts of 4 factors were test, such as plastic film thickness, working speed, depth of excavation and laying time, while potato was excavated and recycled. The four factors and five levels experiment was taken, and the result showed that plastic film thickness, working speed had a big effect on Film recovery rate, and working speed, depth of excavation had a big effect on breaking coat rate. In the potato transport and separation process, the exciter optimal speed was 160 r/min, and safe drop height was 0.3 m. System workflow was built, and the system was taken, the result showed that film recovery rate was 86%, and breaking coat rate was 2.58%.