Through the quality control work of ventilators, we can master their performance and status, then improve the security and accuracy. We detected indicators of the ventilator with ALK. Results: 93.2% of ventilators were qualified. The unqualified rate was mainly because of the inaccuracy of oxygen precision. Through the quality control and calibration work of ventilators, we can ensure the safety and reliability of ventilator in the clinical use. It provides exact basis for the guidance of clinical use. www.jiuxin-med.com