The invention discloses a kneading machine which comprises a kneading chamber, an air inlet, an air outlet, a paddle, a power source and a driving motor. The air inlet and the air outlet are connected with the kneading chamber, and the paddle is arranged in the axial direction in the kneading chamber. The paddle is in a Z shape, one end of a paddle shaft of the Z-shaped paddle is connected with a servo motor installed on the outer side of the body of a kneading machine, the servo motor is connected with an external PC or PLC control cabinet, the air outlet connected with the kneading chamber is connected with an induced draft fan through an induced draft pipe, the induced draft can is arranged outside the body of the kneading machine, and the input end of the induced draft can is connected with the external PC or PLC control cabinet. The kneading machine has the advantages that structural composition is simple, use and operation are convenient, energy conservation and environment protection are achieved, the human burden can be relieved, and the product kneading quality and product stability can be improved.