Since the beginning of the new century, the rising divorce rate in China has attracted widespread attention, the implementation of the divorce cooling-off period policy in 2021 has aroused much controversy. Few studies have conducted empirical analysis on the relationship between policy implementation and divorce level. Through reviewing domestic and foreign policies, we find that it is a common practice in many countries and regions to reduce impulsive divorce by setting a binding time for divorce, raising the threshold and increasing the cost of divorce. China implemented the divorce review period system from 1993 to 2002. By comparing the changes of divorce levels in different policy stages in China, it is found that when the time restriction policy is absent, the level of divorce by agreement increases rapidly, the potential demand for divorce is released, and the rash divorce increases greatly, which promotes the overall increase of divorce level. However, the divorce level was relatively stable when the divorce time restriction policy was in office, indicating that there was a significant correlation between the policy and the divorce level.