Diabetes is easily complicated by tuberculosis, and the risk can be increased many times, especially in patients with a wasted body type. The principle of treatment for diabetes mellitus combined with tuberculosis is to control blood sugar within a reasonable range and to use anti-tuberculosis drugs together for early and effective treatment. Anti-tuberculosis drugs can have an effect on diabetes. In short, diabetes combined with tuberculosis can be cured by reasonable use of anti-tuberculosis drugs. However, because of the combination of tuberculosis and diabetes, drug-resistant bacteria have a higher chance of drug resistance, so it is necessary to do drug sensitivity tests and choose more suitable anti-tuberculosis drugs in combination with the disease, which may prolong the course of treatment. However, the length of life of tuberculosis combined with diabetes will not be affected, so it is necessary to take reasonable medication for diabetes and tuberculosis to control the disease.