Before liberation, there was an individual phenomenon of polygamy among Buyi people. Marriage with the same surname is allowed, but it is forbidden to marry with the same surname. There is also the custom of "cousins get married" and the handover system of brothers and sisters. After liberation, like most ethnic groups, polygamy was abolished. Buyi people advocate free love, and young men and women are free to love before marriage. Unmarried young men and women all over the world like to take advantage of festivals, fairs and group gatherings to talk or express their feelings through chatting, laughing and singing in the form of free combination of three to five people to seven or eight people. A man has a crush on a girl. According to tradition, he must find a third party as a partner, and the others are introduced by his sister-in-law. If the woman wants to, she can meet alone in a quiet place, further sing folk songs and express her feelings until the two sides give each other tokens, indicating that they have pledged their lives. When engaged, the man's parents entrust the matchmaker to the woman's house to send a certain number of gifts such as wine, meat and rakes (BaBa is indispensable in the gifts, if you see BaBa in Buyi people's homes on non-traditional festivals, it means that the family is preparing to marry the woman's happy event).

If the other party agrees, the second matchmaker will make the eight characters of both men and women "effective", and as long as the eight characters match, you can choose the wedding date. The amount of bride price in this area pays special attention to the number of "six" or "double", which is said to be a homonym for taking "six" as land to show that both of them are blessed after marriage. When getting married, the groom doesn't say hello to the bride, but only asks young men and women of several good friends to say hello. Brides usually walk to the man's house with umbrellas, and some ride horses in sedan chairs. On the wedding day, the newlyweds split up and went back to their parents' house the next day. Buyi people in residential areas still have the custom of "living at home" or "sitting at home". Some people have to live in their husband's family for two or three years or even five or six years. Buyi people in mixed areas have largely abolished this custom. Buyi people in Duyun, Guizhou, have the custom of "singing a purse" in their new houses. Generally, the "purse song" is sung first, and two people are paired, one sings and the other has a voice. You must sing 12 Pocket Song to get your wallet. Generally, the purse is filled with things like ginkgo and peanuts, which means that the birth of your son is early and brought by the woman's family.