Tuberculosis is a common infectious disease of the respiratory tract caused by Mycobacterium tuberculosis. In the early stages of tuberculosis, especially in patients with open tuberculosis, when it is more contagious, isolation treatment is required, and children should not be brought along, otherwise it will easily lead to tuberculosis infection in family members, especially children. After 3-4 weeks of regular and adequate oral anti-tuberculosis medication, most of the tuberculosis bacilli in the lungs have been killed. When the sputum culture and sputum TB smear are negative, the infectiousness of the patient is obviously reduced or even non-infectious. However, care should be taken to avoid close contact with children for a long time, and a mask should be worn to keep the indoor air clear and hygienic. In conclusion, the time frame for how long a TB patient can bring up a child varies, and it is only appropriate to bring up a child after 3-4 weeks of oral anti-TB medication and a negative sputum test.