A new rearing system was  adopted  to  efficiently rear Chilo suppressalis in  the large scale. A new artificial diet was provided and two new equipments (the larvae growing box and the pupation ring) were also used for this system. The developmental period from neonate to pupation, the weights of female and male pupae of the 3rd generation in laboratory were compared to other reports. Results showed that the developmental period from neonate to pupation reared by our system is better than other artificial diets. Both female and male pupae reared by our system is also heavier than most of other artificial diets, but little lighter than some fresh materials such as wateroats, sweat corn. The pupation rate from the matured eggs to the pupal stage is about 40%, which means we can collect 80 pupae from each larval box. Based on our primary estimation, it takes 30 h/person to harvest 2400 pupae. In overall, we think this system is labor saving and economic for rearing C. suppressalis in a large scale in laboratory.