Abstract: In order to investigate the adaptability of six varieties of Elymus forage in high altitude area,including wild Elymus dahuricus Turcz.,Elymus sibiricus L.cv.Tongde,excellent lines of Elymus sibiricus L.cv.Tongde,Elymus sibiricus L.cv.Hongyuan,Elymus sibiricus L.cv.Qingmu No.1 and Elymus breviaristatus Keng cv.Tongde,the trial planting were designed and conducted at Haiyan County of Qinghai Province.Furthermore,the plant height,grass yield,fresh/dry weight ratio and stem/leaf ratio of the six selected varieties of Elymus forage were determined and compared.The results showed that the varieties of Elymus sibiricus L.cv.Tongde and Elymus sibiricus L.cv.Hongyuan had higher plant height at initial flowering stage;Elymus sibiricus L.cv.Hongyuan exhibited higher fresh grass yield,indicating this variety could be promoted and utilized after further regional test.