The invention provides crop growth promoting antagonistic trichoderma, in particular to Trichoderma atroviride H18-1-1 and TF28 with preservation numbers of CGMCC No.9774 and 9775 and aims to solve the problem that using agricultural chemicals for preventing and treating agricultural diseases is prone to causing environment pollution and agricultural chemical residues, jeopardizing an agricultural ecological system, killing beneficial microorganisms in the environment, improving drug resistance of phytopathogen and finally causing decline of prevention and treatment effects and even failure in prevention and treatment. The trichoderma not only can be applied to agricultural biological prevention and treatment but also can promote growth of crops such as wheat and prevent and treat diseases caused by rhizoctonia cerealis, fusarium culmorum, fusarium proliferatum and/or fusarium oxysporum and the like.