In Liao Dynasty,there are Khitan、Han、BoHai nationality and so on.In the context of this nulti-ethnic,its social culture also presents diversity.Marriage customis an important part of social culture,not only from objectively reflects the spirit of The Times also show from the microcosmic social economy,national psychology,aesthetic consciousness,ethics,religion,and many other factors,can be said to be the social and cultural side of the prism Evolvement of marriage customis influenced by various factors,compared with the central plains region,both similar aspect,have unique side,contains the rich cultural connotation.