The invention discloses a synthetic method for butroxydim water dispersible granule which is composed of the active compound of butroxydim and promotors and stopper that acceptable in pesticide formulations. The content of butroxydim is around 20-90%. The preparation method is to pulverize the raw drug separately to the particle size of 15-25um and add a small amount of wrapping agent. Then grind the mixture in a ball mill or other grinding equipment to ensure that the original butroxydim particles are coated with a wrapping agent. It is then mixed with other pre-mixed grinding promoter and stopping to adding water to knead into the wet material. After granulation and drying to obtain water dispersible granule product with good performance.
