Abstract: Objective To study the epidemiology of lung cancer in 31 factories workers of Shenyang city form 1970 to 1994.Results Incidence rate of lung cancer were betw een 19.4/105 and 52.9/105 fro m 1979 to 1994,and was the highest (52.9/105)in 1990;male was significantly higher than female.Morality rate of lung cancer of male were between 22.9/105 and 58.9/105 from 1979 to 1994,and was the highest(58.9/105)in 1990;femal were between 7.6/105 and 28.7/105,and was the highest(28.7/105)in 1987;male was significantly higher than female.The survival rates of lung cancer were 8.3% for 3 years,5.3% for 5 years,3.2% for 8 years and 1.3% for 10 years.The centre classifcation was the highest(67.0%)in 3 dukes stages of lung cancer.The squamous cell carcinoma of male was the highest (50.9%)in 4 histological classifcations of lung cancer,and the ademocarcinoma of female was the highest(67.9%).The incidence age of 4 histological classifcations of lung cancer reached high peak in age of 55 to 64 years,and the persents were 44.5% for squamous cell carcinoma,47.2% for adenocarinoma,50.0% for small cell cancer and 35.7% for large cell cancer.