Dates of 204 heads of Suffolk Mutton Buck were analysised by the methods of correlations and regressions.The result showed that the single correlation between the characters of weight, chest girth, body slanting length Rump width and wool length were all positive correlations.The correlation and coefficient were prominent（P＜0.01）.The biased correlation between weight and chest girth as well as body slanting length were both positive correlation（r_23.1=0. 68, r_{13. 2} =0. 65）and the correlation was prominent（P＜0.01）. But the r_23.1 =0.02 was weak positive correlations and was not significant （P＜0.05）.The composite correlations between the body weight and chest girth as well as body slanting lenght were positive correlations and the correlation was very prominent（P＜0.01）.The single and partial regression relations of the body weight and chest girth as well as body slanting length were very prominent（P＜0.01）.