Patients with tuberculosis need to wear masks during treatment to avoid transmitting Mycobacterium tuberculosis to other people and causing a wider epidemic. The masks need to be multi-layer masks with more than 6-8 layers, especially cloth masks are more effective, which have the ability to isolate Mycobacterium tuberculosis. Because Mycobacterium tuberculosis is 4μm long and 0.4μm wide, ordinary masks, especially disposable masks, cannot achieve isolation at all, and professional cloth masks need to be given to have this function. Patients with pulmonary tuberculosis wearing a good mask can avoid inhaling cold air and reduce the chance of viral infection, so as to avoid damage to the liver and gastrointestinal tract from drugs while treating other diseases, leading to further abnormal liver function in patients with pulmonary tuberculosis and discontinuing the treatment of tuberculosis. Therefore, wearing a 6-8 layer cloth mask for tuberculosis can effectively isolate the tuberculosis bacillus and ensure the regular treatment of the course of treatment.