Abstract: In order to study the effects of vitamin on the reproductive capacity of breeding rabbits,the newly-designed formula feed and original conventional formula feed were fed to rabbits under the same conditions in the test. The effects of vitamin on the oestrus time of breeding rabbits,pregnancy rate,parity number,litter size,survival rate of weaned young rabbits were analyzed. 100 healthy breeding rabbits with the same reproductive age were selected and divided into two groups（group A and B） ,with 50 rabbits in each group（male∶ female=1∶4） . The rabbits in group A were fed with the conventional feed and that in group B were fed with experimental feed. The results showed that vitamin can significantly increase the reproductive capacity of breeding rabbits（P0.01） . During four test months,the estrous female rabbits in group B was 2.46 times as that in group A. The average pregnancy rate of female rabbits in group B was 1.72 times as that in group A. The litter size of female rabbits in group B was 11.58 times as that in group A. The survival rate of young rabbits in group B was twice as that in group A. And the ideal mating and reproduction results were obtained.