Mycobacterium tuberculosis is a mycobacterium that can invade all organs of the body, mostly pulmonary tuberculosis, and can be transmitted through the respiratory tract. Many people carry tuberculosis bacteria but do not necessarily develop the disease. The main cause of human tuberculosis is Mycobacterium tuberculosis human type. Mycobacterium tuberculosis grows and metabolizes slowly compared to other bacteria, and carrying tuberculosis bacteria does not necessarily mean having tuberculosis. Under normal circumstances, when the bacterium enters the bloodstream of a healthy person, the body’s immune cells can quickly recognize it and swallow it up. Some of mycobacterium tuberculosis can’t be destroyed by melting after being engulfed, and it is inhibited by human immunity, so it can’t multiply further and cause disease. Mycobacterium tuberculosis has a strong ability to survive, so if the immunity of the body decreases, the dormant Mycobacterium tuberculosis will multiply and cause the onset of tuberculosis in the corresponding tissue. Patients with tuberculosis should be promptly and regularly treated with anti-tuberculosis drugs, such as isoniazid, pyrazinamide, ethambutol, rifapentine and other drug combinations under the guidance of a doctor in an appropriate amount and throughout. TB carriers can be treated without treatment in the early stage. They need to increase nutrition, exercise properly, improve the immunity of the body, promote physical recovery, keep good ventilation and sufficient sunlight in the room, pay attention to disinfection, and remove the TB bacilli in the room and attached to daily necessities.