The invention discloses a bactericidal composite containing dithianon and methoxy acrylic ester compounds. The sterilizing composite comprises A and B, wherein A is selected from the dithianon; B is selected from any one of the following bactericides: kresoxim-methyl, ZJ0712, pyraclostrobin and enestroburin; and the ratio of the weight parts of two active components, i.e. A and B, is (2-78: (2-78). The bactericidal composite provided by the invention can prevent and cure multiple crop diseases, has obvious synergistic action, enlarges the sterilizing spectrum, has higher activity on the diseases, i.e. downy mildew, phytophthora diseases, anthracnose, powdery mildew, alternaria mali roberts, leaf spot diseases, scab, rice blast, and the like, reduces the usage quantity of pesticides and the residual quantity of the pesticides on crops and alleviates the environmental pollution.