Abstract: Chouioia cunea Yang (Hymenoptera: Eulophidae) is a natural enemy of Hyphantria cunea (Drury) (Lepidoptera: Arctiidae), which is a worldwide quarantine organism. C. cunea can effectively control H. cunea. Since this parasitic wasp had been discovered, lots of key work had been studied on biological characteristics of artificial breeding technology. These studies had confirmed that as a bio-control parasitic wasp, with strong ability of reproduction and high ratio of females, C. cunea's parasitic rate is high. In the applications of C. cunea, a set of its breeding and release technology had been found, and control effects of these technologies were effective in many H. cunea endangering areas. But comparing with the research of other parasitic wasps, the basic research of C. cunea need do more works. Such as systemic research in respect of host recognition, parasitic factors and their influence on the development of hosts, molecular biology mechanism of parasitic behaviors, that would provide theoretical guidance to artificial breeding, protection and utilization of this wasp in forest (field).