The present invention provides a kind of manufacturing method of pesticide granule,It is by comprising pesticide activity component,The small ducted body of plastic cement,Interfacial agent,The mixture of binder and calcium carbonate and water are kneaded,Extruding pelletization is carried out,And the dry granules of the universe； Also,The content for being kneaded the water in the composition of Hou gained is 15 ~ 25 weight %,The content of the calcium carbonate in mixture before being kneaded with water is 30 ~ 90 weight %,And the amount of calcium carbonate is 15 ~ 30 weight ratio examples with respect to small 1 parts by weight of ducted body of what plastic cement； It is excellent by floatability of the manufacturing method of the pesticide granule of the present invention pesticide granule obtained on the water surface and diffusivity etc.,It is suitble to apply in rice field. Also, the manufacturing method can the industrial efficiency of what manufacture pesticide granule well.本發明提供一種農藥粒劑之製造方法，其係將包含農藥活性成分、塑膠微小中空體、界面活性劑、黏合劑及碳酸鈣之混合物與水混練，進行擠出造粒，並乾燥造粒物；並且，混練後所得之組合物中的水之含量為15~25重量%，與水混練前之混合物中的碳酸鈣之含量為30~90重量%，且碳酸鈣之量相對於塑膠微小中空體1重量份為15~30重量份之比例；藉由本發明之農藥粒劑之製造方法所獲得的農藥粒劑在水面上之漂浮性及擴散性等優異，適合在稻田中施用。又，該製造方法可於工業上效率良好地製造農藥粒劑。
