Abstract: The study was conducted in one hundred and 140 minks that were birth in 2009,which accorded to seven different mating systems（A, B, C, D, E, F and G）, and then compared the significant difference on the basis of the traditional way. The results showed that the litter size were not significant；the pregnancy was highly significant difference in between A and F, between C and G（P=0.0009；P=0.0004）；the difference of birthing date was significant in between A and E, between C and G （P=0.0119；P=0.0253）. It also suggested that A, B and C could replace the trational way and not affect results through comparing the breeding indexes. Furthmore, factors such as continued mating stimulus, stimulative frequency and mating at intervals of one cycle may contribute to the implantation of embryo, and then shorten the pregnancy.

Key words: mink; mating; litter size; pregnancy; birthing date