Mechanical automatic cutting device

The invention discloses a mechanical automatic cutting device. A frame body is fixed on a vehicle body, a lifting table is arranged on the frame body, a bearing seat is fixed on the lifting table surface of the lifting table, a first bearing with an axis in the horizontal direction is arranged in the bearing seat, a shaft body is fixedly sleeved with an inner ring of the first bearing, the right end of the shaft body is connected with a cutting direction adjusting motor shaft fixed on the frame body, and a cutting mechanism is arranged at the left end of the shaft body; the lifting table surface of the lifting table is also provided with a clamping mechanism for fixing the shaft body in a clamping manner, so that the shaft body cannot rotate; the lifting table, the cutting direction adjusting motor, the cutting mechanism and the clamping mechanism are all in signal connection with a microprocessor through a control panel; and the lifting table, the cutting direction adjusting motor, the cutting mechanism, the