Toxicity of chlorpyrifos and buprofezin to Nilarparvata lugens were evaluated under five different temperatures (22,25,28,31 and 34℃),respectively. Results indicated that toxicity variations of chlorpyrifos to BPH with different temperatures differed with that of buprofezin. LC_(50) of chlorpyrifos to BPH declined with increased temperature. LC_(50) of chlorpyrifos to BPH 24 h,72 h,120 h after treatment under 22℃ were 50.15,16.15 and 15.33 mg /L,while under 34℃ they declined to 6.70,4.16 and 1.92 mg /L. The toxicity of buprofezin to BPH did not differ with the temperatures set in the experiments. Understanding the effect of temperature on the toxicity of chlorpyrifos and buprofezin under a background of global warming will promote the rational application of insecticides.