Open tuberculosis is defined as tuberculosis bacilli excreted in the sputum of a patient with tuberculosis and is highly infectious. Once open TB is diagnosed, it needs to be treated in isolation. This type of tuberculosis is contagious because a large amount of tuberculosis bacilli are discharged through the respiratory tract in the form of droplets when a patient coughs or sneezes and are suspended in the air. Therefore, patients with open tuberculosis must be treated with control, special treatment of their sputum, and early combined, moderate and regular anti-tuberculosis treatment. The above measures can control the infectious agent and reduce the infectiousness of the patient. Patients in the open stage of tuberculosis belong to active tuberculosis, but as long as they are treated with reasonable oral anti-tuberculosis drugs, when their sputum culture and sputum tuberculosis smear are negative, their infectiousness decreases significantly, and patients can go home with drugs and continue oral drug treatment.