Use and using method of fenoxanil or fenoxanil composition

The invention belongs to the field of agricultural chemicals, and particularly relates to use and a using method of fenoxanil or a fenoxanil composition. The new use of fenoxanil as a safener is disclosed for first time, so that the conventional range of use of fenoxanil only as a bactericide is broken, and pesticide hazards to crops caused by a sulfonylurea herbicide can be effectively alleviated. The using method of the safener is matched, so that the yield of the crops can be obviously increased, the application range of the herbicide is widened, new application prospect of the herbicide is created, and the service life is prolonged.