The characteristics of the swamp on Xizang Plateau,as compared with those of the swamps in other areas,are as follows: 1.The unique components of Qingzang Plateau are prominent in association composition.Kobrecia littledalei is an important component of swamp and it with Blysmus sinocompressus forms the special swamp association.This swamp which isdistributed at the highest location in China is characterised by composition simplicity,short and thick grass,sturcture simplification and short growing season. 2.It is mainly the low herbaceous swamp.Besides Cyperaceal swamp and Graraineal swamp,there appears pure weed swamp which forms unique dicotyledom swamp landscape. 3.The succession of swamp vegetation is showing a tendency of naturaldrying,swamp degradation and area reduction.