PROBLEM TO BE SOLVED: To provide an agrochemical solid preparation composition superior in preservation stability of an effective component compound, and an agrochemical solid preparation.SOLUTION: The agrochemical solid preparation composition and agrochemical solid preparation are characterized by comprising (a) an effective compound component of 4-acetoxine-6-tert-butyl-2,3-dimethyl-8-fluoroquinoline, (b) a mineral carrier and (c) at least one additive selected from the group consisting of urea, glycols or their derivatives and an epoxidized oil.COPYRIGHT: (C)2009,JPO&INPIT【課題】有効成分化合物の保存安定性が優れた農薬固形製剤組成物、及び、農薬固形製剤を提供する。【解決手段】(a)有効成分化合物が4-アセトキシ-6-tert-ブチル-2,3-ジメチル-8-フルオロキノリン)、(b)鉱物質担体と、(c)尿素、グリコール類又はその誘導体、エポキシ化油のうちから選ばれる少なくとも1種以上の添加剤とを含有することを特徴とする、農薬固形製剤組成物、及び、農薬固形製剤。【選択図】なし