In the agricultural ecosystem, different crops provide living conditions for many herbivorous animals. And herbivorous animals provide important conditions for the survival and development of parasitic species. Because the parasitic species is not only parasitic on one host. As a result, the existing parasitic groups in the agricultural environment become quite complicated.However, single planting and systematic management in agricultural ecosystems will reduce the biodiversity of parasitic wasps; in addition, the long-term use of chemical pesticides not only leads to increased resistance to insect pests in some areas, but also kills important species of parasitic wasps. If the parasitic wasp continues to be destroyed, the consequences will be very serious. It can be seen that the diversity of parasitic species in agricultural ecosystems is improved. It is necessary to play the role of biological control of parasitic wasps.