Economic exchange is the interchange of goods between economic subjects on the surface, but in essence it is the social and economic relations between subjects, and the exchange of interests and the transformation of rights between them. Economic exchange is a basic expression indicating the differences between man and animals and the manifestation of human nature It can spur economic development and provide sufficient time and substantial material basis to ensure individual freedom and comprehensive development. It can create and uphold good social morality and help individuals improve virtue and self-cultivation. Also, it can improve man's well-being and help individuals perfect their personality. Economic exchange has moral rules such as the legitimacy of exchange, the freedom of exchange, the equality of exchange, the harmlessness of consequences, etc.