In the clinic, the precautions after breast tumor surgery mainly include the following aspects: First, after breast tumor surgery, let the patient go to pillow lying down for 6 hours, and give the patient oxygen inhalation, and need to pay attention to let the patient’s head to the side, so as to effectively avoid the occurrence of misinhalation. After the surgery of breast tumor, the surgical incision of the patient should be changed regularly, and the healing of the surgical incision of the patient should be observed. After breast tumor surgery, we should pay attention to let the patients get out of bed at an early stage. Generally speaking, we should let the patients get out of bed on the first day after surgery, so as to prevent the occurrence of deep vein thrombosis of the lower limbs effectively. After breast tumor surgery, patients should pay attention to diet, generally speaking, patients should be encouraged to eat light, nutritious, easy-to-digest diet, and pay attention to, patients should eat more fruits and vegetables, which can promote wound healing, because fruits and vegetables are rich in vitamin C, vitamin C has the role of promoting wound healing.