Breeding purposes of black water fly larvae: feeding chicken, fish, forest frog, etc. Adult breeding: the breeding and breeding of adult is the key link of black water fly breeding technology, which is related to the supply of black water fly eggs. To ensure the supply of black water fly eggs can ensure the daily fecal treatment capacity of black water fly. Therefore, this link is a crucial link. Some farmers do not have farms, but they can contact solid organic waste resources at a low cost, such as livestock manure, bean curd residue, distiller's grains, powder residue, slaughterhouse waste, lotus root residue and kitchen waste.