High platelets refer to platelets over 300×10^9/L. The cause of elevated platelets can be myeloproliferative disorders such as true erythropoiesis, early stages of myelofibrosis, chronic granulocytic leukemia, but also acute infections, acute hemolysis, etc. When platelets are high, pay attention to what not to eat, first, eat less animal offal, animal fat. Second, eat less fried food, dinner should not eat more meat and fishy thick food. Third, we should pay attention to eat less sweets, it is recommended to choose foods that can dilute the blood, these foods have the role of inhibiting platelet aggregation and preventing thrombosis. For example, hawthorn, black fungus, garlic, onion, green onion, persimmon pepper, shiitake mushroom, strawberry. To drink more water, a reasonable diet with the usual light food, mainly vegetarian, coarse and fine grains, more food rich in soft phospholipids, more soybeans and soy products, more fruits and vegetables containing vitamin C.