The natural conditions and contributing factors of alpine wetland in northwest Sichuan are discussed in this paper.The main biodiversity value of wetlands in this region,such as having peculiar species of the world i.e.Grus nigricollis and some rare endangered species,and having many species of important economic and scientific research significance,is analyzed.Recently,human activities,such as peatland exploitation and overgrazing,which have done great damage to vegetation and caused changes in soil physical chemical quality,and the speciality of the climate that have caused sandification in some parts of the region,all resulting in decrease in biodiversities.Finally,some countermeasures for the protection and sustainable utilization of biodiversities are put forward such as(a)to coordinate the relation between human activities and protection of wetland biodiversities;(b)to strictly control carrying capacity of livestock and expand man made grassland;(c)to establish nature reserves of mire wetland in the plateau; and (d)to utilize the peatland which is the dominant resource in this region to control sandification and work out legislations on biodiversity conservation in mire wetlands.