Tree form characteristics and biomass distribution and volume increment for Quercus spp., Larix leptolepis and Pines koraiensis growing in Kwangju-Gun, Kyunggi-Do were investigated. P. koraiensis showed higher crown percentage than L. leptolepis, indicating that P. koraiensis maybe shade-tolerant species. Biomass allocation by tree height showed significant difference among three species. Stem biomass distributed more dimminishing along tree height with Quercus spp. and P. koraiensis than L. leptolepis. The allometric pattern of leaf-and branch biomass appeared as normal distribution. Present biomass was highest in L. leptolepis showing 171.1tons/㏊ and followed by P. koraiensis and Quercus spp, with 75.3tons/㏊ and 61.6tons/㏊, respectively.