Abstract: Using the sampling method to collect data,the important values for measure indicators,and using richness the index D₂,Simpsom index D¹,Shannon-Wiener index H^′,Sheldon evenness index J_SW and Pielou evenness index E as the measurement index,the community species diversity of 14 natural evergreen broad-leaved forest in Danxia landform area of Langshan Mountain were studied.The results showed that: 1) In similar habitat,along with the syngenesis to the subclimax stage,the change tendency of species diversity is increasable.In the climax community,the change tendency of species diversity of shrubs and herbs was increasable,but arbor have no obvious change.2) Community species diversity was changed with elevation change,besides general common change pattern,but also presents one kind of bimodal curve pattern.3) H^′ and E have higher sensitivity than D¹ and J_SW.There is a significant similar function among with descries species diversity of arbors,shrubs,and herbs with D¹ and H^′,and descries species diversity of arbors with H^′ and E,D¹,and E,J_SW and E,and descries species diversity of herb with J_SW and E.It was concluded that elevation,habitat and succession affect community species diversity in Danxia landform,H^′、D¹、J_SW and E can individually express Danxia landform community pecies diversity.