Trichoderma is a kind of ubiquitous species. It has the characteristics of wide adaptability, diversity of antagonists, and broad-spectrum parasitic. It is considered as the most promising biological control factor. Through multiple mechanisms such as nutritional competition, reparasitic and inducing plant resistance, Trichoderma has antagonism against a variety of important plant pathogenic fungi, and can effectively control soil genetic fungal diseases, such as Pythium, anthracnose, and Fusarium. Root rot, blight, wilt and other soil genetic diseases