The invention relates to the technical field of pesticides and particularly relates to a farm-oriented bactericide. The farm-oriented bactericide contains Zhongshengmycin and pyrimethanil. The weight ratio of the Zhongshengmycin to the pyrimethanil is 1: (4-50). The farm-oriented bactericide is applied to preventing and treating plant fungal diseases and bacterial diseases. The synergistic effect is obvious and the field efficacy is high; a bacteriocidal spectrum is obviously enlarged and the prevention effects on cucumber gray mould, cucumber bacterial angular leaf spot, tomato grey mould, tomato leaf mould, early blight of tomato, tomato bacterial leaf spot, tomato mail head spot, tomato stem rot, pumpkin gray mould, pumpkin soft rot, cauliflower gray mould, garlic gray mould, chive gray mould, strawberry gray mould, grape gray mould, chili gray mould, cowpea gray mould, apple scab, apple altermaria leaf spot, pear scab, pear black spot and tobacco brown spot are very good; the prevention cost is reduced and the manpower of farmers is saved; and the technical threshold is low and the production process is simple.