Abstract: In this paper, the five man-made forest in Heshan Subtropical Downland and the ecological factors are compared and evaluated on the basis of biomass, productivity, species structure, vertical distribution structure and dynamics.Acacia mangium forest and A. auriculeaformis forest grow quickly in the poor down-land, they are good poineer trees. Pinus massoniana forest and P. elliotii forest grow well in the area, but slower than Acacia forests. It′s best way to plant clamix species mixed with the fixnitrogen species in recovery vegetation.