This paper discusses the role of the family, the school, and the society in sexual education.It puts forward that:1.the family is the basic place of sexual education;2.the school is the main undertaker of sexual education;3.the society is the natural classroom of sexual education.The paper analyses the purposes, the function, the contents, and the effects of the sexual education of China, and points out the importance of carrying out sexual education timely and correctly.It also goes into the sexual education ways suitable to the Chinese conditions.