An object of the present invention is to provide: an aqueous suspension agrochemical composition having a good storage stability, with which an increase in the viscosity of a formulation can be inhibited even when the composition contains a high concentration of pyroxasulfone; and a process of spraying the same. The present invention provides: an aqueous suspension agrochemical composition containing: pyroxasulfone; an acrylic graft copolymer; an alcohol alkoxylate; and a lignin sulfonate, in which composition the alcohol alkoxylate contains a polyoxyethylene alkyl ether; and a process of spraying an aqueous suspension agrochemical composition, the process including spraying the above-described aqueous suspension agrochemical composition to a field where agricultural/horticultural plants grow.