1, eliminate the source of infection: active treatment of patients with exclusion bacteria, chemotherapy is known as chemical isolation. Early detection and reasonable treatment: early detection, early diagnosis, early treatment. 2, cut off the transmission route to prevent air pollution: education of patients (coughing, sneezing, laughing is to cover the mouth and nose with a handkerchief), exhaled patients and healthy people should wear masks when talking; medical personnel should wear masks when they come into contact with patients face to face; patients with a large number of exhaled bacteria should live in a single room; environmental control: good ventilation is one of the most effective measures to reduce the transmission of TB. Convective ventilation in the patient’s room can be done 4 times a day for 15 minutes each time. And ultraviolet air disinfection can be used to kill tuberculosis bacilli.