Abstract: The fractal characteristics of pattern of Pinus taiwanensis population in different natural community types in Pingnan and Shouning county was analyzed by applying box-counting dimension and information dimension.The results indicated that P.taiwanensis population in natural community had fractal characteristics;The box-counting dimension ranged from 1.2998 to 1.8626 and the order in different communities was Q3>Q1>Q2>Q4>Q7>Q8>Q5>Q6;The information dimension ranged from 1.2057 to 1.8637 and the order in different communities was Q3>Q1>Q2>Q4>Q8>Q7>Q5>Q6.The box-counting dimension values of P.taiwanensis population in natural and almost pure P.taiwanensis forest in Pingnan showed higher than the mixed forest in Shouning;Box-counting dimension quantified the spatial occupation capability and degree of the population,while information dimension reflected the scale variation degree of pattern intensity and disclosed the unevenness of individual distribution.The fractal dimension was related to community environment,the density of the population,dominant status of the population in community,the aggregated intensity of all individuals and the number of sapling individuals.The fractal dimension of natural P.taiwanensis took on fluctuation up and down as the altitude rose and 1250-1270 m were more befitting altitude to survival.In addition,the fractal characteristics of pattern of P.taiwanensis population possessed a certain scale and the scale of inflexion of point was the infimum.