An object of the present invention is to provide a production process, which converts only the forms of agricultural chemical wettable powders and water-soluble powders to the granular form without altering the prescription in a production process of a granular agricultural chemical composition with excellent handling characteristics.A production process of a granular agricultural chemical composition comprising steps of(a) and (b) after a step of any one of(l) to (5):(1) a step in which agricultural chemical compositions of wettable powders or water-soluble powders are added with water, kneaded, extruded and dried,(2) a step in which agricultural chemical compositions of wettable powders or water-soluble powders are added with water, agitation granulated, and dried,(3) a step in which agricultural chemical compositions of wettable powders or water-soluble powders are added with water, kneaded and spray-dried,(4) a step in which agricultural chemical compositions of wettable powders or water-soluble powders are added with water, and fluid-bed granulated,(5) a step in which agricultural chemical compositions of wettable powders or water-soluble powders are compressed and molded,(a) a step in which the agricultural chemical compositions obtained by any one of the steps of above (1) to (5) is fine granulated by pulverization, and(b) an optional step as necessary, in which the particle size of the agricultural chemical compositions obtained by the step of (a) is regulated by sieving after the fine granulation, is provided by the present invention.本發明之目的在於提供一種在製造使用性優異之顆粒狀農藥組成物時，不改變粉末狀之農藥可濕性粉劑、農藥可溶性粉劑之配方而僅將劑型變更為顆粒狀農藥組成物之製造方法。根據本發明，可提供一種顆粒狀農藥組成物之製造方法，其係在對粉末狀農藥可濕性粉劑組成物或粉末狀農藥可溶性粉劑組成物實施：(1)進行加水、混練、擠出，並使之乾燥的步驟；(2)進行加水、攪拌造粒，並進行乾燥的步驟；(3)進行加水、混練，並進行噴霧乾燥的步驟；(4)進行加水，並進行流動層造粒的步驟；或(5)對粉末狀農藥可濕性粉劑組成物或粉末狀農藥可溶性粉劑組成物進行加壓成型之步驟後，再實施(a)藉由磨碎而製成微粒的步驟，(b)視需要藉由在製成微粒後進行篩選而進行整粒的步驟。
