Secondary pulmonary tuberculosis in both lungs is not particularly serious, it is a special type of pulmonary tuberculosis, mainly due to the initial infection with Mycobacterium tuberculosis, the tuberculosis foci in the lungs have been in a dormant state, no disease, when the body’s resistance decreases, there will be a resurgence of tuberculosis foci and disease; it can also be due to the patient re-infected with the infectious source Mycobacterium tuberculosis, and the original tuberculosis foci become active stage inflammatory response state and the disease develops. After early and timely treatment with anti-tuberculosis drugs, such as isoniazid, rifampin, ethambutol, pyrazinamide, streptomycin, levofloxacin, etc., with standardized, full, appropriate, combined and regular treatment, a course of about one year is able to achieve cure.