The compound fungicide composition disclosed by the present invention comprises kresoxim-methyl and at least one triazole fungicide compound, wherein the weight ratio of kresoxim-methyl to the triazole fungicide compound is 40:1-1:40. The compound bactericidal composition may also include functional auxiliaries and diluents, wherein kresoxim-methyl and triazole fungicide compounds account for 1wt% to 95wt% of the total weight of the bactericidal composition. The compound bactericidal composition can be formulated into emulsifiable concentrate, soluble liquid, microemulsion, water emulsion, suspoemulsion, seed coating, wettable powder, water dispersible granule, dry suspoemulsion, or granules for direct use and other dosage forms. The compound composition is used to prevent and control various diseases caused by fungi such as Deuteromycetes, Ascomycetes, Basidiomycetes, and Mycetes, such as grape powdery mildew, wheat rust, potato blight, pumpkin blight, rice blast, strawberry powdery mildew, Melon powdery mildew, cucumber powdery mildew, pear scab, etc. have achieved the effects of synergizing, concurrently treating, resisting drug resistance, delaying drug resistance, and reducing the dosage of azoxystrobin.