Objective To assess the risk factors of cancer and to offer the bases for making interventional measures.Method A 1:1 matched case-control study was performed in 352 cases with cancers and the main risk factors were screened out with conditional Logistic regression among 47 factors.Results The detection of radioactivity

microwave

water

air and house decoration in campus’s living and working condition reaches the national normal standard

Familial tumor disease

addiction to animal entrails

smoke-smell foods

pickles

deep-fried foods

orts

or smoking

overpressure and serious mental attack are the risk factors of cancer.Otherwise

people who have a pleasant family

higher education and a good income and an interest in vegetables

fruits

meat

milk and some sour-favor foods

will protect themselves from the harm.There were 28 couples who caught cancer in case group.Conclusion The main risk factors of cancer are the familial disease

diet

smoking

mental or psychological factors

long-time touch of poisonous types of work.In a word

cancer is a kind of disease which correlates life style;the essential measure to prevent cancer is to change unhealthy life style.