Protein powder can be taken in moderation after colon cancer surgery. Protein powder is generally a powder composed of a combination of purified soy protein, casein, whey protein and pea protein, which belongs to a kind of health food. Protein powder has the functions of protein supplementation, nutritional supplementation and promotion of metabolism, etc. Currently, it can be applied to nutritional supplementation for teenagers or the elderly, nutritional support for post-surgery patients and energy supply for people who exercise to reduce fat. Postoperative patients with colon cancer are prone to some nutritional depletion. Supplementing appropriate amount of protein powder can replenish the nutritional loss of patients, and it has a certain auxiliary effect on patients’ postoperative recovery. It should be noted that it should be consumed only when the patient has no clinical symptoms such as abdominal pain, bloating, nausea, fever and so on after normal exhaustion. For postoperative colon cancer patients, if there is any discomfort, please consult a specialist in time.