The diet of high blood creatinine should reduce the intake of high protein, low salt and low fat diet, limit the intake of high phosphorus and high potassium food, and limit the intake of fluids. 1. Reduce protein intake: large amount of protein intake will lead to the burden of kidney, which in turn will trigger the deterioration of renal function, so it is necessary to take high quality and low protein, such as fish, lean meat and so on. 2. Low-salt, low-fat diet: People with high creatinine must have a low-salt, low-fat diet, because excessive salt intake can easily cause an increase in blood volume, aggravate the burden on the heart, and then lead to the emergence of high blood pressure. Dietary attention should be paid to limiting the intake of salted vegetables, pickled food, fried food, broth and so on. 3. Limit foods high in phosphorus and potassium: attention should also be paid to supplementing vitamins and folic acid and other nutrients as well as controlling the intake of potassium and phosphorus. 4. Limit fluid intake: for patients with obvious edema, it is necessary to limit fluid intake to avoid aggravation of edema, aggravation of cardiac load, resulting in heart failure and so on. Patients with elevated creatinine are advised to consult regular hospitals for standardized treatment under the guidance of physicians.