Fecha de publicación: -- Fuente: WIPO "tomato" The present invention relates to the field of pesticides, and in particular, to a method for preparing a compound of formula (III). The compound of formula (III) can be used to prepare novel and efficient uracil herbicides. The present invention further provides an intermediate compound used in the method, preparation method thereof and fungicidal use thereof. The synthesis route is simple and the application prospect is broad.