Abstract: In order to study the relationship between body measurements and slaughter performance of Leizhou Black Ducks. Sixty (half was male, half was female) Leizhou Black Ducks which were 300-days-old were selected randomly for body measurements and slaughter test and canonical correlation analysis. The results showed that: most of these quotas in body measurements traits and slaughter performance had a extremely significant or significant positive correlation of Leizhou Black Ducks (P＜0.01 or P＜0.05), only a small part of these quotas had a negative correlation. the results of canonical correlation analysis showed that the first and second canonical correlation coefficients between body measurement traits and slaughter traits were 0.767 (P＜0.01) and 0.729 (P＜0.05), they expressed 42.5% and 33.7% of total correlation, respectively. The analysis indicated that main traits for the canonical correlation coefficients were body slanting length, shank girth, the weight of eviscerated yield with giblet and the weight of whole net carcass.