Throughout the treatment of tuberculosis, the results of sputum examination, culture of tubercle bacilli and drug sensitivity test can help doctors to develop the correct treatment plan, specifically the following points: 1, to help the correct choice of effective drugs: whether primary, re-treatment or refractory bacterium-positive patients to avoid the use of ineffective or inefficient drugs, to truly achieve a reasonable, effective use of drugs. 2, to truly achieve the right amount of drugs: although patients to a drug generally The sputum examination and drug sensitivity test is favorable for doctors to adjust the dose of drugs, within the range that patients can afford, without losing the time of treatment. 3, timely detection of the source of infection: the general large and medium amount of bacterium discharge can attract the attention of patients and their surrounding people. In this case, the culture of tuberculosis bacilli can detect the problem in time, which has an invaluable role in controlling the epidemic of tuberculosis. 4, reduce the economic burden of patients: Doing drug sensitivity apparently increases the patient’s expenses, but in fact it does not. 5, timely termination of the toxic side effects of ineffective drugs: If patients have developed resistance to a drug, and continue to apply it without drug sensitivity testing, it invariably increases both the economic costs and the damage to the body, and delays the treatment of the disease. In summary, the drug sensitivity test of tuberculosis has a very important role in the treatment of tuberculosis, should attract the attention of the majority of patients and medical workers, the active use of sputum examination, tuberculosis culture and drug sensitivity test, the prevention and treatment of tuberculosis has great significance.