Abstract: In order to investigate the control effect of pollution-free technology on Pristiphora erichsonii Hartig, this paper investigated the control effect of different colors of armyworm plates, different concentrations of nicotinic acid matrine and different insect bee ratios. The results showed that different colors of armyworm plates showed different control effects on Pristiphora erichsonii Hartig, and the color trend was red ＜ earthy yellow ＜ yellow ＜ green. The control effect of green armyworm plates was 94.51%,which was significantly higher than that of the other three colors of armyworm plates. The control effect of nicotine-matrine emulsion was 95.29% after 5 times dilution, but there was no significant difference with the control effect of 10 times liquid（92.95%）.Spraying 10 times liquid was the most economical and effective. When the ratio of insect to bee was 1∶6, the corrected control effect reached 92.73%, higher than 90%, which was significantly higher than that of other treatments. The three tested prevention and control technologies are all pollution-free, and can achieve more than 90% of the control effect, and the promotion value is high.