The utility model relates to a lycium barbarum special offset single-knife trencher, which comprises a frame body, a traction frame, a power transmission device, a trenching disk, a rotating shaft andat least six trenchers, and the traction frame is fixed to the front end of the frame body and the power transmission device is attached to the frame body, one end of the rotating shaft is fitted with the power output of the power transmission device, and the other end of the rotating shaft is fixed in the middle position of the trenching disk, and a trenching cutter is fixed on the edge of the trenching disk. The lycium barbarum special offset single-knife trencher relates to a disk type rotary opening way, which is simple in structure, and only needs a simple small tractor to pull, and transmits the power output of the tractor to the power transmission device, the power transmission device drives the trenching disk to rotate, and then the trenching cutter is opened, rotary trenching fits all kinds of sand and hard soil, and does not need too much power output, and can complete the trenching.