Abstract:According to the data from the experiments, the author deals with the differentitating, tending and intermediate cutting of Luzon pine (Pinus kesiya var. longbianensis) in the standard lands. The research results indicate that the growth differentiation of Luzon pine is most striking during the young and middle growth of 6—15 years, and the growth would become stable when the stand is close to its mature age of 25 years. The change of its root system happens simultaneously with that of those parts above the ground. With regard to the mode of tending and thinning, it would provide better resoults to apply lower story thinning during young growth, overall thinning during middle growth, and to employ upper story thinning when the stand is drawing near to its maturity. The mixed growing of Luzon pine with hardwood would produce certain positive effect on soil reservation, soil amelioration, and on preventing plant diseases and insect pests.