Marriage is a common custom of all ethnic groups in Vietnam as well as in the world. For the Muong families, marriage is especially important. In traditional society of the Muong, the wedding took place for long days with many different rituals. Nowadays, under the influence of the market economy and international integration, the practices of culture and marriage rituals of the Muong people have been undergoing significant changes. Specifically, changes in personal thoughts, in criteria for choosing a partner, in marriage rituals and practices, offerings, transformation in costume, in eating, and celebrating weddings. The changes have profoundly affected the traditional wedding culture of the Muong, thereby shaping a vivid and complex picture of cultural life of the Muong nowadays.