Kidney is the foundation of life, and the health of kidney directly affects the health of the body. Nourishing and protecting the kidney in life can be carried out in several aspects: 1, eating some foods that tonify the kidney. Diet is an indispensable part of health preservation, so we should pay attention to diet while tonifying kidney. We should eat less cold, spicy and high-salt foods, and eat more nutritious and digestible foods, such as melon, yam, sesame and walnut. 2, sexual intercourse is temperate. Too much sexual intercourse will hurt the kidney, mainly because of too much nocturnal emission, so we should pay attention to moderation in daily life and not indulge or force it. 3, people's mental state will affect the health of the five internal organs, thinking about hurting the spleen, afraid of hurting the kidney, afraid of directly hurting the kidney. 4. Prevent kidney infection and be alert to drug injury. Pay attention to prevent infectious diseases, drink plenty of water every day and keep normal urine. When taking medicine, we should also pay attention to taking medicine in strict accordance with the doctor's advice to prevent drug-induced renal damage.