Abstract: Investment composition and economic benefit of the Chinese fir seed orchard in Qingyuan County,Zhejiang Province were analysed and evaluated.The result showed:(1)in this orchard,616.5 thousand Yuan of fund for production was invested in 20.years productive periods,that accounted for 66.31% of the total invested in the orchard.And the investments in capital construction and equipment were 33.69% of the total.520.2 thousand Yuan was invested in seeding periods of the later 15 years,that amounted to 90.22% of the total invested in superior seed producing area.(2)incomes of selling seeds totaled up to 644.1 thousand Yuan in 20 years of productive periods,that retrieved a fund of 616.5 thousand Yuan.The NPV was 296.6 thousand Yuan, IRR was 8.0%,and the BCR 1.42 Yuan.Through a period of 19 years and 3 months,the investments have been retrieved.(3)the volume genetic gain of good strains was 15.39%,so the good strain user would get 180.7 Yuan else by investing one Yuan after one lumbering rotation.Based on systematic methods,it showed a good social and economic benefit in this seed orchard.