[Objective] The differences of soil microbial biomass carbon(MBC) and microbial biomass nitrogen(MBN) in Carya cathayensis stands with different management intensification were explored to provide scientific basis for soil management.[Methods] Soil MBC and MBN collected from four intensive-managed forests(IMF) (5, 10, 15 and 20 years, respectively) were assayed and compared with the corresponding values of natural broadleaf forest(0 year).[Results] Soil MBC and MBN, MBC/MBN and MBC/SOC decreased significantly at the first 10 years after conversion from evergreen and deciduous broadleaf forest(EDBE) to intensive-managed forest(IMF), and then increased slowly. In comparison with the corresponding value of EDBF(0 year), MBC, MBN and MBC/SOC in 0-10 cm soil layer of chinese hickory forest with 10-year intensive management decreased by 52.1%,32.0% and 31.0%, respectively. These indices were also lower than those corresponding values of stands with other intensive management years. Soil MBC/MBN with 10-year intensive management was lower than the values of stand before 10-years; Soil MBN/TN remained stable under different years. [Conclusion] Soil MBC and MBN of Carya cathayensis stands decreased remarkably after intensive-management was conducted.