Commonly known as water chafer beetle, black shell insects, is a traditional Chinese folk medicine two fresh water and insects. Diving has high nutritional value, protein content as high as 21.7%, the highest for animal food. In crustaceans and Coleoptera rich in calcium, phosphorus, iron and other nutrients glycosaminoglycan, is not only a better nutritional health nourishing food, but also for prostatitis, frequency urgency, enuresis in children, malnutrition plot, the attenuation function of a better therapeutic effect.