Taking the Sheila Muren grassland as the research object, based on the comparision of soil mechanical composition, moisture content, density, porosity, organic matter content, alkaline hydrolysis nitrogen, available phosphorus, available potassium and other indicators in degraded grassland with different terms of enclosure, the effects of enclosure on degraded grassland soil properties was explored. The results showed that with the increase of enclosed years, 0-20 cm layer soil clay content and porosity increased, but the bulk density and moisture content gradually reduced year by year in grassland. As the enclosed time going on, the soil available potassium content reduced, but soil organic matter, available phosphorus and alkaline hydrolysis nitrogen content increased gradually. Regression analysis results indicated that the change in soil organic matter, alkali-hydro nitrogen, available phosphorus and available potassium content had significant correlation with enclosed years. Thus, it can be seen that enclosure is an effective measure to promote soil improvement and vegetation restore in degrded grassland.