The interpersonal etiquette refers to the common behavior norms and moral principles that have been formed in human social interactions, which mainly consist of etiquette, politeness, ceremonies, and appearance. The behavior of interpersonal etiquette as an important content of preschool morality education is not only the concentrated expression of children's interpersonal ability and moral level development, but also the comprehensive representation of the moral and spiritual style of a nation in the future. The development of children's interpersonal etiquette behavior has the characteristics of stage, difference, and gradual progress. In order to promote the development of children's interpersonal etiquette behavior, kindergartens should establish a scientific preschool etiquette curriculum system, provide preschoolers with a prepared environment for etiquette behavior development, parents should establish a correct etiquette education concept and master scientific etiquette education methods, and society should vigorously promote the social atmosphere of respecting etiquette and culture, helping children internalize the behavior norms and social norms, enhancing their cognition of interpersonal rules, cultivating their awareness of civilized interpersonal communication, enhancing their ability of behavior self-discipline, and promoting the development of children's interpersonal etiquette behavior.