Abstract: This article reported 102 cases of adenosquamous carcinorna of the lung treated surgically, which was 10%, of the total patients admitted with lung cancer in the same perlod. lt's clinical features were easy to lnvade adjacent organ, early spread and the disease became soon, representing poorly differentiated cancer. The longer invasion of the tumor beneath the bronchial mucous membrane is rare in other pathological types. of 25.3% the resected bronchial edge far from the tumor in 1 to 5cm in peripherlal lung cancer was invaded pathologically. The 3 and 5-Year'ssurvival rate was 16.4% and 8.9% poorer than others. It was considered as a mixed poorly differentiated tumor, then having poorer prognosis. The ratio of the two kinds of malignant cell is related to the volume of the tumor. It was said that the bigger size the tumor ls, the more squamus cell have. The diagnostic standard and the reason was disscused. If the tumor was resected radically in early stage,good result may be obtained. But in the modera1ely and late stage, surgery combined with chemotherapy and radiotherapy should be used.