Abstract:Using the method of wood property analysing and sulphate pulp-making,we studied the chemical composition , phydsicla nature,pulp making process and pulpcharactereistics,and pointed out the effect of age site condition,density and produdive re-gion on pulp wood property ,pulp making process and pulp charactereistics.It is shownthat the wood property and pulp index of Larix olgensis pulp plantation which is elderthan 15 years old can satisfy the pulping and paper making .For cultivation short rota-tion Larix olgensis pulp plantation, we should harvest wood elder than 15 years after planting.The better the sitc condition and the more suitable the plantation desity,the better the wood propery ,which would be beneficial to pulping and paper making But But the influence of site condition and population density on pulp physics intensity is not obvious.On the same condition the wood property of Larix olgensis pulp plantation in southe pro- ductive region is superor to that in north productive region.