As the most common malignant tumor of the breast, the risk factors for breast cancer are mainly related to greasy food, that is, high-fat food. In addition to a high-fat diet, breast cancer is also associated with early menarche, late menopause and obesity, and has a certain family genetic predisposition. As a fruit, orange does not contain fat and is not a high risk factor for breast cancer, so breast cancer patients can eat oranges. In addition to avoiding high-fat diet, breast cancer patients should also undergo timely radical surgery and post-operative chemotherapy, radiotherapy and even molecular targeted drugs to improve the cure rate.