Four developed stages of forestry construction have been classified based on the evaluation standard: Non-sustainable, Semi-sustainable, initial sustainable and harmonizing & efficient sustainable forestry, the synthetic score of every level is <60score, 60-79score, 80-89score and ≥90score.
Forest chemical industry can produce various useful products by chemical processing of forest resources It is one of the important fields of effective and sustainable utilization of forest resources.
Through the study the whole process of substance cycle in enviroment ecosystem,we can conclude thatthe key of implementing sustainable development is the sustainable use of resources with high efficiency.