Urinary stones are a common disease of the urinary system in adults. Therefore, the prevention of the occurrence and development of urinary stones depends to a large extent on whether it is reasonable to eat. Medical experts point out that the prevention of urinary stones lies in the scientific and reasonable diet, summarized in the following aspects of the appropriate and avoid. The main focus is on dietary fiber, calcium-containing foods and vitamin food supplementation. 1, pay attention to dietary fiber intake: research shows that the intake of dietary fiber and the incidence of urinary stones is negatively correlated, increase the intake of dietary fiber can make the urinary calcium oxalate and uric acid reduced. Cereals, potatoes and fresh vegetables are rich in cellulose, so that the coarse and fine match, more fresh vegetables can play a beneficial role in increasing dietary fiber. 2, increase the intake of food containing calcium: low calcium can make osteolysis greater than bone production, blood and urine calcium are increased, but also make the absorption of oxalic acid and excretion through the urinary tract increased, so that oxalic acid and calcium deposition will occur, and promote the generation of urinary stones. Therefore, the diet should increase the intake of calcium-containing foods, such as milk, fish and shrimp, kelp, etc. Be careful not to take calcium supplements to prevent urinary stones, but too much calcium supplements have an increased risk of developing urinary stones. 3, eat more vitamin-rich food: vitamin B6 can reduce the formation of calcium oxalate crystals in the urine, vitamin K can reduce the content of oxalic acid in the urine, so the intake of these two vitamins in the diet should be increased. Green vegetables such as alfalfa, spinach, cabbage, and oranges are rich in both vitamins and can help reduce the incidence of urinary stones when eaten properly. Avoid: mainly include the restriction of foods containing large amounts of oxalic acid, animal protein foods and high salt foods. 1, limit the amount of oxalic acid food intake: most of the oxalic acid in urine comes from the body’s metabolism, a few are from food, but still pay attention to reduce the absorption of oxalic acid in the intestine, we should try to avoid foods rich in oxalic acid such as chocolate, coffee, etc. 2, control the intake of animal protein food: excessive intake of animal protein can increase the excretion of oxalic acid and calcium by urine, reduce the excretion of citrate, reduce urinary PH and increase the chances of urinary stone formation. So in the diet should pay attention to control the excessive intake of animal protein. 3, avoid eating high-salt food: high-salt food can increase urinary calcium, while reducing the excretion of citrate, which increases the incidence of urinary stones, so in the daily diet when cooking to put less salt, to eat less pickles, bacon and fried food, to keep the diet light. Also pay attention to drink more water to prevent the occurrence and recurrence of urinary stones.