The invention discloses a four-working-procedure numerical control carving machine which comprises a machine base, a controller, a carving support, a conveying belt, a discharging hopper, an ejectionplate, a fixed support, a connecting plate, a supporting plate, rollers, a waste water box, a water storage box, a first limiting rotary knob, a second limiting rotary knob, a water dividing pipe, a high-pressure spraying head, a filtering plate, a water discharging pipe, an object storage box, a first water pump, a second water pump, a power box and a water adding pipe. According to the four-working-procedure numerical control carving machine, the rollers are arranged at the bottom of a washing device, free movement can be achieved, normal work of the discharging hopper cannot be influenced,operation is simple and convenient, and the occupied land is small; the stretching length of the connecting plate can be adjusted up and down, the stretching length of the fixed support can be adjusted left and right, and therefore the washing equipment can meet the installing needs of discharging hoppers in different sizes and angles; and the high-pressure spraying head is adopted for washing thedischarging hopper, the waste water box is arranged at the bottom of the discharging hopper, waste water can be stored and is prevented from flowing to the ground, the washing process is efficient and more clean, and the labor amount of a worker is effectively reduced.