The present invention provides an aqueous agrochemical suspension composition comprising (a) 10 to 50 weight pcnt of diethofencarb, (b) 2 to 12 weight pcnt of lignosulfonate, and (c) 40 to 80 weight pcnt of water, wherein the amount ratio of the diethofencarb to the lignosulfonate is within the range of 100:15 to 100:100 by weight (provided that the amount of the aqueous agrochemical suspension composition is 100 weight pcnt ), which can reduce the crystal growth of diethofencarb as well as a generation of air bubbles in the preparation stage of a composition or the preparation stage of a spray solution.
