For children, the development of a sense of security is very important. Today, the author gives you a brief knowledge of the development of a child’s sense of security. Before a baby is born, the mother’s womb gives them absolute security. The fetus doesn’t even know what needs he has yet, and the mother has already met those needs. Generally, as long as the mother is relatively stable during pregnancy and there is no rejection of the baby’s arrival, there is no problem with the fetus feeling safe. When the baby is born and leaves that warm, safe, comfortable place, they begin to develop a true sense of security. The age of 0-6 years is a critical period for the establishment of a child’s sense of security. Also this can be divided into two stages: 0-3 years old and 4-6 years old. The greatest influence on a child’s sense of security is the level of parental care and the relationship between the parents. Before the age of 3, the mother has a greater influence on the child’s sense of security than the father. If the child receives adequate attention and response during this stage, has sufficient skin-to-skin contact (such as hugging, breastfeeding, touching, etc.), and is satisfied with both “unconditional acceptance” and “sense of importance”, the child’s sense of security will be better established. The child’s sense of security is better established. From the age of 4, the child’s self-awareness is gradually established, the child begins to have the concept of “I” and is very concerned about whether this “I” is good enough, very dependent on others in terms of self-perception and evaluation, very much in need of praise, affirmation and recognition from others. At this time, the most important other people are still the child’s parents, and the father’s influence gradually begins to catch up with or even exceed that of the mother. As you can see, the most important thing to help children develop a sense of security is the parents. Parents can achieve their own emotional stability, peace of mind, and trust in their children, dare to rest assured to cultivate their children’s independence and self-confidence, encourage children to explore and innovation, while creating a relaxed, harmonious and democratic family atmosphere, so that children can feel that their parents love them, while parents also love each other. These can definitely raise a child with a high sense of security.