Abstract: In this article,Pinus bungeana Zucc.ex Endl.in Beijing was used as a research object to discover the correlation degree between the influencing factors and its evaluation which was based on the Grey correlation Analysis.The results indicated that when the height of Pinus bungeana was 1.5 m,the sequencing of the correlation coefficient was crown plumpness>crown width> the branches density>production cost> ground diameter>the rate of crown height and clear bole height >clear bole height> lopsided crown.When the height of Pinus bungeana was 5 m,the sequencing of the correlation coefficient was crown plumpness>crown width> the branch density> lopsided crown> the rate of crown height and clear bole height >clear bole height>ground diameter>production cost.With the increase of height(When the height of Pinus bungeana was equal or greater than 3.0 metre),the correlation coefficient between the single price and crown plumpness,branch density and lopsided crown was maximum,while it was always minimum between the single price and clear bole length,ground diameter,and production cost.

Key words: grey correlation analysis, value evaluation, Pinus bungeana Zucc.exEndl