Fungicidal composition containing fluopyram and chlorothalonil and application of composition

The invention discloses a fungicidal composition containing fluopyram and chlorothalonil and application of the composition. According to the fungicidal composition containing fluopyram and chlorothalonil, fluopyram and chlorothalonil serve as main effective components, and the weight ratio of fluopyram to chlorothalonil is (1-70):(1-50). The invention further discloses application of the fungicidal composition in preparing medicine for preventing resistant plant fungal diseases. The fungicidal composition can be applied to preventing cereal, fruit tree and vegetable diseases, has a high synergistic function, overcomes and delays drug resistance of germs, is high in fungicidal speed and long in persistence, reduces application cost and has a prevention effect obviously better than that of fluopyram or chlorothalonil. The fungicidal composition can be used for preventing fungal diseases on crops, can be particularly used for preventing the rust diseases, anthracnose, powdery mildew, downy mildew, gray mold and other fungal diseases, and has effects better than those of fluopyram or chlorothalonil.