Medical nebulizer is a liquid, drugs into atomized small particles, is one of the important means of treatment of respiratory system-related diseases; the current clinical medical nebulizer can be divided into jet nebulizer, ultrasonic nebulizer and vibration sieve hole nebulizer. 1. Jet nebulizer: is currently the most commonly used, with a small droplet diameter, moderate atomization speed, easy to operate patient compliance and other advantages. 2. Ultrasonic nebulizer: is the early use of more nebulizers, because it has the disadvantages of destruction of drugs, larger droplets, unsuitable for suspension, etc., in recent years to be less used. 3. Vibrating sieve hole nebulizer: it has the advantages of high nebulization efficiency, controllable droplet size and less pollution, but the cost is higher, the sieve holes are easy to be blocked, and the clinical application is not higher. Should be based on the patient’s age, disease state, respiratory form and the physical and chemical properties of drugs and other factors to consider the choice of suitable for the patient’s nebulizer, such as symptoms of physical discomfort, should be timely to the hospital, consult a physician for guidance.