This machine mainly hanging on by its rear tractors, input shaft transmission right installation sprocket, the Lord eccentric shaft drive shaft connecting block, digging shovel do reciprocating movement, and then by the left end shaft gear transmission gears sprocket on bridge, and change the direction of transmission chain drive, the separation of the drive shaft, and row chain transmission by the eccentric block and drive vibrating at both ends. In walking tractor, make the traction digging shovel unearths the potatoes on the separate row, row in the chain transmission chain of separation between in gas, potatoes, and not falling below the lumps, in row in vibrating screen above the chain, again after a separation of cleaning machine shop on the ground after put.