Punaluan family is a family form of group marriage in primitive society, which originated from consanguineous families. Also known as punaluan family family marriage, group marriage outside the family. The punaluan family family is Hawaiian, which means close companions. That is, a group of brothers and sisters or distant sisters marry a group of men of the same age but not their brothers, or a group of brothers and sisters marry a group of women of the same age but not their sisters. Since then, these women no longer call each other sisters, and men no longer call each other brothers, but the Punaluan family. This kind of marriage not only excludes consanguineous marriages of different generations, but also excludes consanguineous marriages of the same generation, which is an improved family form relative to consanguineous families. The punaluan family family is the beginning of exogamy. The punaluan family family was named after Morgan, an American ethnologist in the19th century, and used this term in scientific research, believing that it once existed universally and was the direct cause of the clan system.