Abstract: In order to explore the correlation between different catgut embedding time in jiaochaoxue and postpartum uterine involution of dairy cows, 20 Holstein cows were chosen. 5 Holstein cows were for control group and the remaining dairy cows were embedded catgut in different time after cow giving birth. Then the detailed lochia eduction and uterine involution of every cow were recorded. As a result, the proper catgut embedding time was in postpartum 1~6 hours, while in the period before or after the above time, the effect is worse, but there was no significant difference between them.

Key words: dairy cow, jiaochaoxue, catgut embedding time, uterine involution