ObjectiveIn order to understand the changes of regulation function of soil moisture for the pre-harvest, post-harvest and reforestated Chinese fir (Cunninghamia lanceolata) plantation.MethodBy continuous observation in fixed locations of 24-year-old Chinese fir plantation, the soil samples before harvest, 1 year after harvest and 1 year, 3 years, 5 years, and 8 years after reforestation were collected, and the function of soil water regulation and storage capacity were investigated by laboratory data analysis.ResultThe results showed that compared with pre-harvest period, the capillary porosity of soil 1 m in depth increased by 1.70% at post-harvest period, and the non-capillary porosity decreased by 4.95%; the water holding capacity, the minimum holding capacity and capillary power of the soil increased by 4.02%, 2.67% and 5.31% respectively, but the water storage capacity declined by 14.30%; the initial infiltration capacity of the soil 0~20cm and 20~40 cm in depth decreased by 19.81% and 16.95% respe