The experiment of plasma treatment on peanut was carried out in the paper.The results showed that the number of root,average length of root and falling needle rate of peanut were increased by plasma treatment.While plant heights during seedling stage,flowering stage and falling needle stage were decreased.Peanut yield increase by 166.0-608.0 kg/hm² compared with treatment 7,which was 4.1-13.7%.Economic output increased by 832.0-3 042.0 yuan/hm².In treatment 2,yield increased by 608.0 kg/hm²,which was 13.7%,and economic output increased by 3 042.0 yuan/hm².The result showed that treatment 2 was optimal treatment with the most yield increase and economic output.