The etiology of pancreatic cancer has not yet entirely clear. Some have been found related to pancreatic cancer and environmental factors, including the establishment of the risk factors for smoking, smokers relative risk of non-smokers to 1.5 times. Moreover, with the increased number of smoking. Other risk factors are diabetes, cholelithiasis, drinking, as well as chronic pancreatitis. Dietary fat and protein intake too much, endocrine and metabolic disorders and genetic factors related to gastrectomy 20, and they are also factors in pancreatic cancer