Excessive crystals in the kidney are a prerequisite for the formation of kidney stones, so kidney crystals are a precursor to kidney stones, mainly due to the formation of crystalline substances such as calcium, oxalic acid, uric acid, cystine and other organic substrates that accumulate abnormally in the kidney, and when more and more are accumulated, they become kidney stones. The formation of kidney crystals is clinically considered to be related to diet structure as well as lifestyle habits to some extent. The intake of aquatic products is closely related to the formation of kidney crystals, and the increase of animal protein in the diet structure can contribute to the formation of crystals in the upper urinary tract. In addition, low body activity and frequent retention of urine are also detrimental to the smooth and timely excretion of crystals, resulting in the formation of renal crystals. If the condition of kidney crystals occurs, usually the doctor will recommend first to change the diet structure and living habits to prevent the formation of kidney stones: 1. Adjust the diet structure: patients need to increase water intake to ensure sufficient daily urine discharge. The body’s intake of large amounts of water can promote blood circulation, dilute the concentration of calcium and oxalic acid in urine, reduce the supersaturation of urine, reduce the probability of urine salt deposition, reduce the formation of crystals in urine, thus improving the symptoms of kidney crystals. It is also necessary to eat more fruits and vegetables, which can help promote urine alkalinization and facilitate the dissolution of uric acid salts, while the plant fiber contained in fruits can help reduce the absorption of calcium in the intestine, thus inhibiting the formation of crystals and reducing renal crystallization. In addition, pay attention to the reasonable intake of protein and calcium, both to ensure that the body’s nutritional needs, but also need to avoid a large intake leading to the formation of kidney crystals; 2, lifestyle habits: dinner consumption should not be too late, because the body usually reaches its peak urination 3-5 hours after the meal, if bedtime for adequate urination, may lead to the retention of urine at night, inducing the formation of kidney crystals. In addition, you should also increase the amount of exercise and avoid sitting and standing for a long time, which can promote the discharge of kidney crystals.