Dietary habits are an important factor in the formation of urinary stones, but they are not an absolutely relevant factor. The intake of a diet high in animal protein increases the acid load of the body, leading to a decrease in the pH of the urine, an increase in the amount of calcium and uric acid in the urine as well as a decrease in citrate. Animal offal contains too much purine and cauliflower in vegetables is also relatively high in purine, both of which increase uric acid. The intake of sucrose promotes the absorption of calcium and correspondingly increases the absorption of uric acid. Excessive intake of spinach, tomatoes and tofu can increase the oxalic acid content in the urine, so the urinary calcium of vegetarians is generally lower, which can play an important role in preventing stones. The finer the food, the faster the body absorbs it after intake, which increases the urinary stone content in the urine and can also promote the formation of urinary stones.