Abstract: In the experiment effect of lectine on lactating sow was studied, in order to provide theoretical help for lectine used in lactating sow. Effect of different supplemental level of lectine on lactating sow were studied.The results as follows: All of the adding groups increased the cote weight of piglet of laecating sow both at 20 days old and 28 days old (p<0.05), and increased the lactation of laecating sow at 20 days old (p<0.05). Only the group of adding 4% lectine + 4% oil decreased the weigh lose of laecating sow (p<0.05) and decreased the interval from weaning to oestrus (p<0.05), the survival rate of adding groups was higher than that of control group.