Postoperative liver metastases of rectal cancer can be treated by drugs, surgery and radiotherapy. However, metastasis of rectal cancer indicates that the cancer has entered the advanced stage, which is usually difficult to be cured. However, the life cycle of patients can be prolonged and the quality of life can be improved through active treatment. As long as the treatment is as follows: 1. Drugs: Commonly used drugs include capecitabine, oxaliplatin, bevacizumab, cetuximab and other drug treatments (chemotherapy, targeted therapy, etc.), which can regulate the growth of tumors, and can be applied to the treatment of advanced colorectal cancer at present. 2. Surgery: palliative surgery can be performed for patients with advanced rectal cancer, which can relieve pain and deal with complications. It can relieve patients’ symptoms such as difficulty in defecation or intestinal obstruction. 3. Radiotherapy: killing tumor cells in the irradiation field by focusing radiation. For advanced or recurrent patients who cannot be cured radically, radiotherapy can be used to relieve local symptoms. Patients with postoperative liver metastases of rectal cancer need to actively cooperate with doctor’s treatment and keep a healthy and optimistic mindset. Family members should encourage patients to build up confidence to overcome the disease and actively cooperate with treatment.