Abstract: In order to optimize spatial structure of the ecological forest,make full use of multiple functions of the ecological forest,the paper took Pinus massonianaecological forest in Fushou as a study object,and analyzed the spatial structure characteristics with five indexas of stand spatial structure including uniform angle index,mingling index,neighborhood comparison,story index and open degree of stand.aiming to provide the basis for the optimization of the spatial structure of the ecological forest of Pinus massoniana.The results showed that the average value of mingling degree of the stands was 0.29,belonging to the transitional type of weak and moderate mingling,mingling degree of tree species was low,and the stability of the stand structure was weak.the average value of neighborhood comparison of DBH of the stands was 0.53,belonging to moderate state,which indicated the number of trees in diameter classes was roughly equal.the average value of uniform angle index was 0.52,which was aggregated distribution,but close to random distribution,the average story index of stand was 0.39,which indicated canopy structure of stand was relatively simple,the average open degree of stand was 0.29,which indicated the trees in the stand were lack of growth space.

Key words: Pinus massoniana, ecological forest, spatial structure