Abstract: In order to supply theoretical basis for vegetation recovery of desertified grassland, the effects of enclosure on vegetation characteristics in desertified grassland have been deeply analyzed by measuring characteristics values of desertified grassland communities which are enclosed for 1 year, 4 years and 7 years in Hulunbeir desertified grassland and contrasting with the unenclosed. The results show that community composition has varied regularly after enclosure and the proportion of indicator plant of deteriorated grassland has gradually decreased and the proportion of constructive species and some better palatable species has increased with the enclosing time increasing. In addition, enclosure can greatly increase vegetation coverage, mean height, grass community density, ground biomass and soil turf contents on desertified grassland.