Abstract: Objective: To study the clinical characteristics and prognostic factors of bronchi-oloalveolar carcinoma. Methods: Clinical data of 107 inpatient cases seen in The Cancer Hospital of Tianjin Medical University, from 1990- 2000, were retrospectively reviewed. Results: The overall 1-year survival rate was 88.7%, the 3- year survival rate was 64. 8%, and the 5- year survival rate was 48.6%. The main prognostic factors were tumor diameter (P=0.022), bronchial stump (P=0.016), TNM stage (P=0.000), T stage (P=0.002), N stage (P=0.000), and postoperative radiotherapy (P=0.001). Cox regression analysis suggests that TNM stage (P=0.000) and tumor diameter (P=0.015) are independent factors affecting prognosis. Conclusions: The overall survival rate of BAC was superior to other NSCLC.TNM stage and tumor diameter are independent factors affecting the prognosis of BAC.