Attachment is a special lasting emotional bond between the infant and the mother, which is a positive mutual relationship between the mother and the infant filled with deep affection. Its formation is related to the mother’s frequent satisfaction of the infant’s needs and the provision of pleasant and reinforcing stimuli, and is the result of the infant’s social awareness of people from generalization to differentiation during interactions with them. Attachment emotions are expressed in the form of the infant’s preference to be close to the object to which he is attached, when he feels comforted, comfortable and happy. Once this attachment security is established, the infant will be more free to explore the new things around him, will be willing to try to interact with others, and will adapt more widely to society. Thus, this mutual attachment between mother and infant is a “safe base” for infants to interact with others and explore the outside world. The quality of this early mother-infant attachment is important for the infant’s cognitive development and social adaptation later in life. This is what we mean by secure attachment, which not only promotes children’s intellectual development, but also promotes trust, self-trust, successful attachment to one’s peers and offspring, and good interpersonal relationships with people. How can we build this secure attachment emotion? The main thing is that the mother should pay attention to reasonably meet his needs in communication with her baby, to express her love for her baby from expressions, words, touching, hugging and other skin contact, and more convenient to give him emotional support when he encounters problems. In a new environment or contact with strangers to encourage him, tell him that “mommy is here to watch you,” to encourage him to explore and interact with people boldly. If this is done, most babies will be able to build secure attachments. If there is a lack of patient care and mother-child bonding, some types of insecure attachment or non-attachment may occur. Babies who do not establish mother-infant secure attachment feelings are more than likely to be poor at getting along with people later in life, or to not be able to face reality well and be prone to some psychological problems.