[Objective] The research aimed to determine the effects of different land use of meadow grassland on the biological activities of meadow soil. [Method] The enzyme activities were analyzed with five typical land use in western Horqin Sandy Land. Soil samples at the depth of 0- 10 and 10- 30 cm from natural grassland,forestry field,4-year corn filed,20-year corn filed and paddy field were determined.[Result]Different land use and soil depths had significant influence on the enzyme activities. The activities o...