Since the patient’s body is in a state of negative nitrogen balance after open heart surgery, it is necessary to eat more food with higher protein content to supplement the body’s demand for protein. In addition, it can also accelerate the healing rate of the wound, enhance the immunity of the body, improve the body’s resistance, and effectively resist the infection of the wound by viruses, bacteria and other exogenous pathogens. For example, turtle soup, because turtle soup is high protein, low fat and highly nourishing food, and pig’s feet soup, soybean soup, etc., pig’s feet contains a lot of collagen, can effectively promote wound healing, perch wolfberry soup in because wolfberry has a certain blood tonic healing effect, and perch meat also contains a lot of protein, fat, calcium, vitamins, etc., and the fat of perch meat is unsaturated fatty acids, constitute the brain and the main component of nerve cells, which helps the recovery after surgery.