Children's sex education is to let children know their gender and enter gender roles, such as encouraging boys to be brave and strong, encouraging girls to be gentle and sweet, loving cleanliness and so on. Also, boys should wear boys' clothes and girls should have girls' clothes. Starting from one's own likes and dislikes may become the cause of family discord in the future. Generally speaking, if parents give their children good sex education, it will help their children grow up. Need to give some encouragement and affirmation. Correct children's disgusting thoughts in time to avoid the inversion of gender roles in the future. Teach children the most basic knowledge of sexual hygiene, let them learn to keep their sexual organs clean, and tell them how to protect themselves outside. Parents should not use rude words to attack their children personally, but should educate their children in good faith. Until the arrival of children's adolescence, parents should plan ahead, instill some sexual knowledge into their children, let them prepare psychologically in advance, and avoid sexual ambiguity caused by excessive curiosity in adolescence. It is also necessary to carry out sexual psychology and sexual morality education. In short, sex education for children should adhere to the principles of nature and appropriateness. Parents should educate their children by heart. In family life, parents should choose appropriate opportunities, such as bathing and sleeping. Let children know their bodies naturally, especially let them realize that the reproductive organs are not as mysterious as other organs of the human body, and guide them to keep their bodies clean and develop good hygiene habits. In short, it is very important for parents to educate their children about sexual safety.