Relationships of chlorophyll from understory plants to canopy openness,understory indirect site factor(ISF) and leaf are index(LAI) were investigated using quadrat method.Spatial heterogeneity of chlorophyll content in Chebaling National Nature Reserve,Shixing County,Guangdong Province, was also investigated.The results indicated that chlorophyll content in leaved of Neolitsea levinei and Castanopsis fissa increased with canopy openness;Chlorophyll content in leaves of Castanopsis fissa increased with ISF,and chlorophyll content in leaves of Schima superba and Sinobambusa tootsik increased with LAI.All the above variables showed significant linear correlation with leaf chlorophyll content(P<0.05).This study also showed that chlororophyll content from different species varied significantly.