Species diversity of different forest restoration types was studied in red soil eroded region, and the responses of soil biological indicators to the changes of species diversity were also discussed with multiple regression analyses. The results showed that the restoration rate of species diversity was the fast in natural secondary. The changes of species composition for arbor, shrub and herbage were different. Soil organic matter, microbial biomass carbon, bacteria amount, fungi amount, microbial amount, urease, acid phosphatase were improved along with increasing species diversity of shrub. ...