Chouioia cunea Yang is a natural enemy for many kinds of crop and forestpests, particularly for Hyphantria cunea Drary, which is an international qua rantine pest. The experiment of rearing Chouioia cunea with Tussah (Silkworm) pu pa were carried out by "three-cut method" and inoculating method. The results showed that three-cut method is effective way for breeding Chouioia cunea, with a parasitical rate of 95%. The biological characteristics and the life cycle of Ch ouioia cunea were observed and described and more hosts of Chouioia cunea were f ound. "Three-cut method" as a new technique of rearing Chouioia cunea has been put into practice.