Abstract: Renovation of low-quality and low-benefit forest is to improve forest structure and forest productivity and enhance stand ecological functions.With the low quality and low yield forest in Yanshan Mountains in North China as the object of study,analysis and assessment were conducted on forest carbon sequestration and oxygen release value and water conservation value. The result showed that under different management measures,the improved forest carbon sequestration value of releasing oxygen and water conservation value have increased significantly.In terms of overall functional value,the artificial regeneration produced highest economic value,53 850.04 yuan/hm²,followed by selective cutting transformation 20 753.5 yuan/hm²,vegetation recovery 18 767.15 yuan/hm²,the clearcutting transformation 15 932.75 yuan/hm²,introduced shrubs 13 883.86 yuan/hm²,closure and cutting ban 12 460.24 yuan/hm².

Key words: larix principis-rupprechtii, management measure, functional benefits, analysis and evaluation