Survival time of Cryptolestes ferrugineus (Stephens) was analyzed by mixing food-grade inert dust with paddy on the surface of grain in horizontal warehouse to verify the effect of prevention and control. The survival time of C.ferrugineus was 0.8d in pure food-grade inert dust, 0.9d after mixing 150mg/kg food-grade inert dust with paddy; while 13.3d without paddy and 18.6d in paddy. The results showed that the effect of food-grade inert dust on C.ferrugineusis was obvious, and the application of food-grade inert dust in horizontal warehouse could reduce the amount of C.ferrugineus, but the technology needed to be further studied.