The experiment was conducted to study the effects of dietary threonine levels on growth performance, serum immune and biochemical indices of weaning to 2-month-old meat rabbits. Two hundred weaning meat rabbits were randomly assigned to 5 groups with 40 replicates in each group and 1 rabbit in each replicate. Rabbits in the 5 groups were fed basal diet supplemented with 0, 0.1%, 0.2%, 0.3% and 0.4% threonine, respectively. The trial lasted for 7 days for adaptation, and 23 days for test. The results showed that dietary threonine supplementation significantly increased average daily feed intake (ADFI) (P<0.01), and significantly affected average daily gain (ADG) and feed/gain (F/G) of the rabbits (P<0.05) when the initial body weight was not significantly different. The dietary threonine levels had a significant influence on nitrogen intake (IN) (P<0.05), but had no significant influences on digestible nitrogen (DN), retained nitrogen（RN）and DN/IN （P>0.05）. With the increase of threonine levels, the serum concentrations of immunoglobulin A, immunoglobulin M and immunoglobulin G had no significant changes (P>0.05). The dietary threonine levels had a significant influence on the activity of serum alkaline phosphatase (AKP) (P<0.05), but had no significant influences on the contents of total protein (TP) and triglyeride (TG) (P>0.05). In conclusion, the appropriate dietary level of threonine for the weaning to 2-month-old meat rabbits is 0.69%.［Chinese Journal of Animal Nutrition，2011，23（4）：703 -708］