The invention relates to a potato processing device with high strength and efficiency. The device comprises a harvesting unit and a cleaning unit. By combining harvesting with cleaning on one integral device, deep processing of agricultural products can be achieved quickly and efficiently. By arranging and improving parts of the units, the overall efficiency of the integral device is high, and durability is improved. By improving the material of a plough share and conducting thermal treatment on vulnerable elements of the plough share, high strength and high rigidity of the vulnerable elements can be maintained so that the vulnerable elements can not become the disadvantage of the whole device, and then the overall durability of the device is improved.