This machine is a research and development achievement of the national sweet potato industry technology system. It is matched with small and medium-sized tractors and adopts a two-stage lifting angle, which is conducive to rapid separation of sweet potatoes and soil, reduces the load on the harvester lifting chain, and improves the sweet potato yield; On both sides of the front end, inclined vertical ridge breaking knives are used to reduce forward resistance. A non powered rotating anti entanglement mechanism is installed at the upper end of the ridge breaking knife to prevent residual vines from entangling on both sides of the frame during harvesting and to prevent blockage.