Postoperative lymphedema of breast cancer can be prevented or delayed to a large extent. In daily life, we should not only pay attention to protecting the affected limbs from weight, exertion, preventing mosquito bites, avoiding blood collection, blood pressure measurement, avoiding injuries, infections, avoiding high temperature, strong sunlight irradiation and paying attention to warmth, etc., but also take some measures to promote lymphatic reflux, such as timely postoperative rehabilitation training, rehabilitation exercises or slow and gentle exercises, such as playing tai chi, ba duan jin, etc., in a gradual and long-term persistence. Such as playing taijiquan, Ba Duan Jin, etc., step by step, long-term persistence, every day can also take the centripetal massage of the affected limbs, should also pay attention to often elevate the affected limbs, when the affected limbs feel pain to pay attention to rest.