[Objective] The effects of forest reconstruction in Changting County, Fujian Province since 1980s were analyzed in order to provide a reference for the restoration and reconstruction of forest vegetation in this region. [Methods] Seven forest stands reconstructed in different years were selected in the study area, seven 20 m×20 m plots were set up for species survey, and the β-diversity measurement index was used for analysis. [Results] ① The species diversity index and evenness index in the study area increased with the afforestation time. ② Whittaker index changed with the length of afforestation time. As the value of Whittaker index decreased with the increase of afforestation time, vice verse. [Conclusion] Forest restoration time is an important factor affecting forest β-diversity in soil erosion areas in Changting County. The longer the reconstruction time, the higher the forest β-diversity value.