The effect of 20%cypress seed on mutton flavor was studied in this paper.Twelve goats with similar body weight(40±2.2)kg were randomly divided into two groups:cypress seed group(N=6)and control group(N=6),the control group was fed with basal diet.The trial period was 3 months,the pre-trial period was 20 days,and the formal trial period was 100 days.The results showed that:(1)there was no significant difference in the cholesterol content between the cypress seed group and the control group(P>0.05),but the cholesterol content decreased by 14%.(2)there was no significant difference in the content of amino acids between the cypress seed group and the control group(P>0.05),but the total content of amino acids increased by 9.0%.(3)16 kinds of fatty acids were detected in mutton of control group and cypress seed group,but the kinds were slightly different..Conclusion:adding 20%cypress seed in feed can improve mutton flavor.