The application belongs to the field of pesticides, and particularly relates to an
adjuvant combination for preparing a suspension agent,
flufenacet water suspension agent and a preparation method thereof, wherein the
adjuvant combination comprises, in parts by weight, 5-20 parts of a synergist, 5-15 parts of a
wetting dispersant and 1-3 parts of a stabilizer; the synergist is one or a mixture of several of polyether,
fatty alcohol ether and
organosilicon; the
wetting dispersant is one or a combination of any of high-molecular polyacrylate, polycarboxylate and
polyester; and the stabilizer is EDTA
sodium salt; the
adjuvant combination is used for preparing the
flufenacet water suspension agent, so that the storage stability and application performance of the preparation are improved, and the effects of reducing the cost of using the
pesticide, increasing the effect with a reduced amount and
environmental protection are achieved.