Abstract: Icerya aegyptiaca was regarded as a serious pest for ornamental plants especially in South China featured with very wide range of diet, strong reproduction ability and easy spreading. Predation of Icerya aegyptiaca by Rodolia pumila was investigated under the laboratory condition in this work. The result indicated that predation response of Rodolia pumila fitted Holling typeⅡ functional response with instant attacking rate is 0.577 and treating time is 0.019. According to Hassell model, the factor describing disturbing effect of increasing predator density was estimated to be m=0.434. The potential predating ability and the optimal prey density have been estimated to be a=24.7 and b=16.5 respectively by Wang’s new model. Considering comprehensive parameters related to predation, Rodolia pumila might be unqualified to be independent agent for biological control of Icerya aegyptiaca.