Tuberculosis is mainly spread by droplet transmission. Tuberculosis is a chronic respiratory infectious disease caused by Mycobacterium tuberculosis infection of the lungs. Mycobacterium tuberculosis is the patient with tuberculosis through loud talking, coughing, sneezing with tuberculosis bacillus body fluids out of the body, in the air to form suspended particles, healthy people through breathing will contain tuberculosis bacillus particles inhaled into the body, infected with tuberculosis bacillus. Mycobacterium tuberculosis is mainly transmitted by air, that is, droplet infection. When a patient with infectious tuberculosis coughs and sneezes, sputum containing tuberculosis bacteria becomes droplets and spreads in the air, and normal people may be infected with tuberculosis bacteria after inhalation. Therefore, when a patient with tuberculosis is undergoing treatment, especially in the first 1-2 months, it is best to live in separate rooms with family members, eat separately, separate dishes and chopsticks, sterilize the dishes and chopsticks every 10 days, and try to do as little contact as possible, especially not close to children, so as not to transmit tuberculosis to children.