Elymus is a perennial herbaceous plant and one of the important pastures and slope protection soil-fixing plants. It is mainly distributed in Northeast my country, Inner Mongolia, Qinghai, Hebei and other regions. This plant has gradually It is cultivated on a large scale in the northern region and has become the main forage species in my country. Of course, Elymus elegans has a strong adaptability and can be grown in much of the western and northern regions with harsh environments.