Abstract: Abstract: The control effect of 37 insecticide mixtures against Cnaphalocrocis medinalis were tested in rice through field spray. The results showed that, 20 days after single spray, 11 mixtures got control effect above 90%, 23 products were between 80%~89%, 3 products were ＜80%. It was concluded that, reasonable mixture could still effectively prevent the attack by Cnaphalocrocis medinalis in rice.