This experiment was conducted to investigate the effects of dietary copper supplemental level on growth performance, fur quality, meat quality and nitrogen metabolism of growing Rex rabbits. Two hundred 1-month-old Rex rabbits with the similar health conditions were randomly assigned to 5 groups with 40 replicates per group and 1 rabbit per replicate. Rabbits in 5 groups were fed experimental diets with the following copper supplemental levels:0, 5, 15, 45 and 135 mg/kg, and copper content measured values in experimental diets were 8.19, 13.59, 23.78, 54.08 and 143.68 mg/kg, respectively. The trial lasted for 7 days for adaptation and 60 days for test. The results showed as follows:dietary copper supplemental level had extremely significant influences on average daily gain and average daily feed intake (P<0.01), and had no significant influence on feed/gain (P>0.05). The highest values of average daily gain and average daily feed intake appeared when dietary copper supplemental level was 15 mg/kg. Dietary copper supplemental level had significant influence on fur weight (P<0.05), but had no significant influences on fur area and fur thickness (P>0.05). The fur weight in 5 mg/kg group was significantly higher than that in 45 and 135 mg/kg groups (P<0.05), but no significant difference was found between 5 and 15 mg/kg groups (P>0.05). Dietary copper supplemental level had extremely significant influence on drip loss (P<0.01), and had significant influences on muscle pH_{45 min} and yellowness (b^*) value (P<0.05), but had no significant influences on muscle shear force and the values of lightness (L^*) and redness (a^*) (P>0.05). The minimum of drip loss and the maximum of pH_{45 min} appeared when dietary copper supplemental level was 15 mg/kg. Dietary copper supplemental level had extremely significant influences on nitrogen intake, urinary nitrogen, digestible nitrogen, nitrogen retention, nitrogen apparent digestibility and nitrogen bioavailability (P<0.01), and had significant influences on fecal nitrogen and nitrogen availability (P<0.05). Considering all indices of this experiment, the appropriate dietary copper supplemental level is 15 mg/kg for growing Rex rabbits (dietary copper content measured value is 23.78 mg/kg).