Bactericidal pesticide composition containing difenoconazole

The invention provides a bactericidal pesticide composition containing difenoconazole. The composition consists of the difenoconazole and chlorothalonil as effective drug ingredients, and pesticide accepted auxiliary ingredients, wherein the weight ratio of the difenoconazole to the chlorothalonil is 1:50-50:1, preferably 1:30-20:1. Through combination of drug ingredients with different action mechanisms and action modes, dosage of each single preparation can be effectively reduced, antibacterial spectrum can be enlarged, and drug fastness of drugs can be delayed. The pesticide composition can be used for preventing early blight of tomatoes, and preventing leaf spot, powdery mildew, scab and the like of grains, cotton, fruits, vegetables and other crops, has effect obviously superior to a single preparation of two drug ingredients, and has significant popularization value.