The paper took degraded quaternary red soil in Jiangxi province as the object of the study.Species diversity and community stability of 7 kinds of rehabilitated forests 27 years later were studied.The results showed that the Marglef richness index(R) were in the order of Pinus massoniana forest without disturbance>Pinus massoniana forest with check dam>Pinus elliotti forest with bamboo-burl-groove>Pinus massoniana forest with planting grass and bamboo-burl-groove>Pinus massoniana forest without check dam>Pi...