Gastritis patients can eat fish, because fish is a high protein, high vitamin, high mineral food, these nutrients, not only to supplement the body’s essential nutrients, and to enhance the immune function of the digestive tract, to promote the healing and repair of damaged tissues in the stomach, play a positive significance. The fat content of fish, mainly in the form of unsaturated fatty acids, has the effect of reducing the accumulation of cholesterol in the inner wall of blood vessels, accelerating the speed of blood circulation and metabolism, and preventing cardiovascular and cerebrovascular diseases. However, fish such as grass carp, carp and silver carp have a high purine content in their bodies, so for patients with chronic diseases such as rheumatic heart disease, hyperuricemia and kidney failure, the intake should be strictly controlled to avoid adverse consequences, and in addition, the cooking form should be kept as light as possible to reduce the burden on the tissue function of the gastrointestinal tract.