Oxidation ditch using air-injecting extrusion for defoaming

The invention discloses an oxidation ditch using air-injecting extrusion for defoaming. The oxidation ditch comprises an oxidation ditch body, and the oxidation ditch body comprises an oxidation ditch sidewall A, an oxidation ditch sidewall B and a rotating shaft. A bearing seat A is mounted on the oxidation ditch sidewall A, and a bearing seat B is mounted on the oxidation ditch sidewall B. The rotating shaft which is a hollow pipeline penetrates the bearing seat A and the bearing seat B and can rotate in the bearing seat A and the bearing seat B freely, a motor is connected at one end of the rotating shaft and drives the rotating shaft to rotate, and a rotating output shaft of the motor is connected with the rotating shaft. A plurality of foam breaking rods are arranged on the circumferential face of the rotating shaft, an axis of each foam breaking rod is perpendicular to that of the rotating shaft, an air supply pump is communicated at the end, far away from the motor, of the rotating shaft, and the rotating shaft is provided with a plurality of air outlet micropores which are formed in areas between adjacent foam breaking rods.