ObjectiveTo discuss and evaluate the value of DSA in the clinical staging of central lung cancer.MethodsIn the 51 central lung cancer patients who took the interventional treatment(squamous cell cancer 31cases,small cell cancer 20 cases),age range was from 41 to 80 years old,(average age was 67 years old).Compared the DSA and CT staging results of ≥Ⅲa stage and ＜Ⅲa stage in the 51 patients of central cancer before interventional treatment and analysis the analogic distinction.ResultsIn the 51 central lung cancer patients,18 cases CT staging were≥stage Ⅲa and 33 were stage＜Ⅲa.A comparison of DSA to CT,using DSA staging,42 cases were≥stage Ⅲa and 9 were stage＜Ⅲa.The sensitivity of CT examination was 33.33%,specificity of CT examination was 58.33%,On the contraction,the sensitivity of DSA examination is 100%,the specificity of DSA examination was 75.00%，there were identification of statistical between the two methods(P＜0.05).ConclusionThe staging sensitivity and specificity of DSA were better than CT in clinical staging of central lung cancer. Combination of the two methods was better than using single one in clinical staging of central lung cancer.