Abstract:The analysis of growing procedure of tree height, diameter breast height and volume have been made using 350 dominants, 175 mean trees and 28 sample trees in 35 sample plots of Korean pine plantation which are 17-50 years of on 10-16 set index, and the optimum mathematical models to correspond biological characteristies were given. The growth of Korean Pine plantation is slower during before 7 years old, and it becomes faster following the age increasingly. The growth is stable during 30-50 years old, and it becomes slower again after 50 years old. The peak of current annual increment occurs ahead on the high set index. The growth of diameter breast height is faster during 10-20 years old. The volume becomes increasingly apparent after 30 years. Four stages of growth of Korean Pine were divided. They are: Young tree period (before 8 years old), fast-growing period (8-30 years old), volume fast-increasing period (about 30-70 years old), and solw-growing period (after 70 years old). The are Korean pine, Chinese pine, Japanese larch, and Korean larch in order of timber-volume when site type, forest age (50 years old) and density are at the same in Caohekou.