This paper describes vegetation on the Songnen Plain and classifies vegetation types in steppes,meadows and swamps.The authors not only discuss the ecological condition of steppe vegetation,the constituents of plant population on the Songnen Plain,and their bacie types and succession,but also approach some ways of artificial improvement on natural steppes.In this region,there are 27 associations which are suitable for grazing and 450 plant species which are suitable for forage.Among them,more than 30 species belong to fine grass of perennial gramineous and leguminous plants.