Objective To explore high risk factors of large instestine cancer in loudi city.Methods 132 cases of large intestine cancer of in-patients were reviewed from jan 1990 to Dec 2001,we used paired patients with non-alimentaly system disease as comparative studing group.Results By one way analysis (ANOVA method) of condition logistic regression showed that familial tumor,ulcerative colitis,intestinal polyp,schistosome infection,hormone substitution therapy etc diseases history,social-ecnomical situation,consumed fibre (fruits,vegetables),consumtions of friying meat treated with high temperature,salted fish and salted meat,frying food in oil,smoking≥35 years,physical training were all related to large intestine pathogenesis.Five risk factors were scrrened by condition logistics multiple factors,they were familial tumor histor,intake frying food in oil,smoking ≥35-age,number of calcium intake.Conclusion Large intestine pathogenesis in loudicyte were related to familiar tumor history,intake frying fook in oil,salted fish and salted meat consumption,smoking ≥35 years and number of calcium intake.