Belief of Blood relatives is the spiritual worship of human blood and moral framework. It is not only the moral connotation of blood obligations, is also 'calculate' interest ethics adjusting mechanism. It has characterized human characteristics , maintain blood characteristics of community association, constitute the family's spiritual structure and social dimension stability structure basis. But the faith of blood relation often is not only limited to the significance of blood relatives and lack of social interaction, but also over narrow.Hence the moral main body of blood relatives is difficult to spontaneously become communication contract ethical system, the moral main body.