[Objective] To investigate the distributions of soil enzyme activities in different aggregates fractions for the different revegetation types in the Loess Plateau in order to provide basic data for vegetation restoration project.[Results] The field investigation and the laboratory experiments were used to explore the effects of vegetation restoration on soil enzyme activities.[Results] The soil enzyme activities in the natural grassland and Caragana korshinskii lands with the 15 and 25 year ages were higher than that in crop land. The activities of soil enzyme activities increased with the increase of the aggregate sizes in small and moderate sized aggregates(1~2 mm, 2~3 mm and 3~5 mm), but decreased in the big sized aggregates. Soil enzyme activities were mainly distributed in the moderate aggregates (1~2 mm, 2~3 mm and 3~5 mm). The small(<0.25 mm, 0.25~1 mm) and large(>5 mm) soil aggregates showed less soil enzyme activities. In the 0-20 cm soil layer, soil enzyme activities increased with the age of C. korshinskii, while it was stable in the 20-40 cm soil layer.[Conclusion] The activity of soil enzyme is gradually strengthened with the increase of plantation years, and the slope farmland is not conducive to the improvement of soil enzyme activity. Natural grassland and the C. korshinskii lands improved the accumulations of soil enzyme activity and should be protected in the future.