After colorectal cancer liver metastasis surgery, patients cannot eat normally for a short period of time, and after the huge surgical trauma, the patient’s body is in a high catabolic state, the insulin response is insufficient, the body’s ability to process and utilize glucose is also reduced, and the body’s energy consumption is about twice as much as that before surgery. In this case, patients at this moment must be given sufficient energy to reduce the consumption of body tissues, promote the repair of tissues and facilitate the recovery of patients. 1, the initial postoperative period is generally fasting, giving intravenous rehydration, if the gastrointestinal tract peristaltic function is restored, it can be replenished by enteral and parenteral nutrition, and the organism recovers for a period of time and then transitions to single enteral nutrition. Enteral nutrition is transitioned from liquid and semi-liquid to soft food and universal food, this process needs to pay attention to the speed of feeding, control the temperature of food, and the amount needs to be progressively from less to more. Food should be high in calories, high in protein and vitamins and easy to digest. In addition, when supplementing nutrition, always observe the patient’s gastrointestinal tract receptivity and observe whether there is any discomfort after eating, such as vomiting, abdominal distension, abdominal pain, etc., and promptly inform the doctor. 2.After resection of colorectal cancer liver metastasis, besides paying attention to the patient’s diet, it is also necessary to pay attention to their psychological state. Patients with colorectal cancer liver metastasis, who think they have advanced tumor and have little chance of survival even after surgery, are prone to extreme fear and anxiety. As family members, they should understand the psychological needs and characteristics of patients and provide targeted psychological guidance; in addition, they should also let patients understand the treatment methods so that they can eliminate their worries and build up confidence to overcome the devil. 3.Postoperative condition should be closely observed, taking into account the observation of complications after liver and colon surgery, and once signs of complications (ascites, bleeding, intestinal obstruction, etc.) are reported to the doctor in time for early treatment. 4.Post-operative medical advice should be followed and regular re-examination should be conducted.