Abstract: To understand the control effect of imidacloprid preparations against Nilaparvata lugens, 16 insecticides were tested in rice through field spray. The results showed that, 7 days after single spray, fipronil got the maximum control effect of 96.6% and asetamiprid got the minimum control effect of 24.9%. Among the 16 insecticides tested, fipronil, imidacloprid, buprofezin and phoxim got control effect above 90%; fenobucarb, chlorpyrifos and isoprocarb were between 80%~90%; 5 kinds were 70%~80%, 2 kinds were 60%~70% and 2 kinds were below 60%. It was concluded that, imidacloprid, buprofezin, fenobucarb, and isoprocarb, as well as fipronil, chlorpyrifos, and phoxim can effectively prevent the attack by Nilaparvata lugens in rice.