The invention discloses a phosethy-Al and folpet 
water dispersible granule and a preparation method thereof. The effective components of the phosethy-Al and folpet 
water dispersible granule are phosethy-Al and folpet, and the 
water dispersible granule is prepared by mixing phosethy-Al and original folpet with 
wetting agents, dispersants, disintegrants, thinners and adhesives, wherein the content of the phosethy-Al is 20 to 60 percentage by weight, and the content of the folpet is 10 to 50 percentage by weight. The preparation method comprises the following steps of: stirring the components well and 
grinding the mixture to obtain original 
powder, adding a certain proportion of deionized water to the original 
powder and uniformly mixing, and then granulating, 
drying and sieving to obtain the phosethy-Al and folpet water dispersible granule. When the phosethy-Al and folpet water dispersible granule is used, the cost is lowered, and environmental 
pollution is reduced. Compared with the single 
dose, because the compound technique is adopted, the 
efficacy is improved, and the 
toxicity is lowered. Because different addition agents are added, the water dispersible granule has the advantages of high 
active component content, high disintegration speed, good dispersive property, good heat storage performance, high bactericidal potence, high safety, and the like.