The recurrence rate of stones is very high, 15% in two years and 50% in ten years, so it is crucial to prevent stone recurrence. 1. Drink more than 2000ml (8~10 cap glasses) of water daily to ensure a daily urine volume of about 2000ml. Limit salt to 5 grams per day. 2.Eat citrus fruits in moderation to increase the amount of potassium citrate in urine. 3.Do more outdoor activities. 4.Unless the patient has clear hypercalciuria, generally patients do not need to avoid milk, beans and other calcium-containing foods. 5, six months after the urinary tract stones are cured, it is necessary to routine urinary system ultrasound examination. Within one year, abdominal X-ray examination should be performed. 6, must be timely collection of discharged stone powder, and sent to the test, according to the following analysis of the composition to determine the specific prevention and treatment program: (1) calcium oxalate stones: avoid eating spinach, sweet radish, tea, chocolate, various dried fruits (pine nuts, walnuts, chestnuts, peanuts, etc.), strawberries, rhubarb, wheat. (2) Uric acid stones: avoid eating animal offal and alcohol. Limit the consumption of meat and fish to no more than 100 grams per day. Eat less cauliflower and mushrooms. Alkalize the urine. (3) Mixed magnesium ammonium phosphate and calcium carbonate stones: control urinary tract infection. Take vinegar to acidify the urine. (4) Calcium phosphate: Avoid eating pumpkin seeds, coffee, strong tea.