Manual and automatic switching spline shaft clutch

The utility model discloses a manual and automatic switching spline shaft clutch which comprises a motor, a reduction gearbox, a steel wire rope winding spline shaft, a gear shifting piece and a clutch spline shaft. The motor is in driving connection with the reduction gearbox, the reduction gearbox is in driving connection with the clutch spline shaft, the clutch spline shaft and the steel wire rope winding spline shaft are coaxially arranged, and the steel wire rope winding spline shaft is rotationally arranged on the reduction gearbox; the steel wire rope is wound on the spline shaft and can reciprocate relative to the reduction gearbox along the axis of the spline shaft; two sets of protrusions are arranged in the circumferential direction of the clutch spline shaft, the gear shifting piece is located between the two sets of protrusions, an existing automatic gearbox is improved, the clutch spline shaft is arranged to move in a reciprocating mode relative to the reduction gearbox along the axis of the clu