Surgical treatment for pancreatic cancer can only remove the solid tumor that is visible to the naked eye, but some of the cancer cells have undergone local spread, blood or lymphatic metastasis, so there is a possibility of postoperative recurrence and metastasis to distant organs. Pancreatic head cancer is a highly malignant digestive system tumor with insidious onset, and patients in early stage basically have no symptoms. Many patients come to the clinic after abdominal pain, emaciation, jaundice and other symptoms, and they have already developed to the middle or late stage. Pancreatic head cancer has biological characteristics such as infiltration and metastasis, so even if early patients undergo surgical resection, the effect of surgical treatment is not good, and the recurrence rate and metastasis rate after surgery are very high. Liver metastasis after pancreatic cancer resection usually occurs when pancreatic cancer cells undergo hematogenous metastasis before surgery, but the imaging examination can not detect these tiny metastases, and the metastases grow gradually after surgery, thus pancreatic cancer liver metastasis is found. It is recommended to actively carry out standardized treatment under the guidance of specialists in order to improve the survival rate.