Abstract: Objective To evaluate the clinical characteristics of new smear positive pulmonary tuberculosis complicated by diabetes mellitus, and to find case earlier and improve efficacy. Methods 111 cases from local resident with new smear positive pulmonary tuberculosis complicated by diabetes mellitus who hospitalized in our tuberculosis control center between January 1997 and June 2009.  Result The case with new sputum positive pulmonary tuberculosis complicated by diabetes mellitus had clinical characteristics as follows: more middle and old aged patients, extensive lesion, much mycobacteria in sputum, slow sputum negative conversion and poor lesion absorption. Conclusion The patients with new smear positive of pulmonary tuberculosis complicated by diabetes mellitusshow specific clinical characteristics. Strict control glycemia and reasonable antituberculous treatment should be taken into account.

Key words: tuberculosis,pulmonary, diabetes mellitus