Disclosed is a sputum suction catheter. The sputum suction catheter comprises a sputum suction catheter body, the head end of the sputum suction catheter body is provided with a bent joint conveniently matched with a respiratory tract for sucking sputum, and the tail end of the sputum suction catheter is provided with a joint conveniently connected with a respirator; the head end of the bent jointis provided with a sputum suction port, the side part of the head end of the bent joint is provided with double side holes or opposite through holes; the included angle between the bent joint and thesputum suction catheter body is 120-150 degrees. The sputum suction catheter is simple in structure, safe and practical, and meanwhile, can suck out sputum in the respiratory tract when effectively reducing irritation to the body, well adapt to the physiological structure of the body and reduce pain of a patient during intubation.