From the perspective of baby's ability development, 2-4 years old is the reference age for entering the park. Whether it is sent to kindergarten before the age of 2 or after the age of 4, it has certain positive and negative effects on the baby's physical and mental development. Positive effect under 2 years old: faster adaptation. Because there is a great demand for babies around 2 years old to explore actively, the non-family exploration environment provided by kindergartens can usually satisfy the baby's exploration heart scientifically and reasonably. Negative effects: it is easy to cause emotional alienation between the baby and the mother. Because about 2 years old is the anxiety period of mother-child separation. If the parent-child relationship is not well established, the baby will have unsafe attachment behavior, which will affect the future emotional intelligence development. When the baby is sent to kindergarten before the age of 2, it is best to take the following measures to make up for the separation anxiety caused by it: 1. If you have to send him to kindergarten because of busy work, you should have full parent-child communication two hours before the baby goes to sleep, and through parent-child reading and parent-child games, the parent-child relationship will be brought closer, so that the baby can get the care of his family, especially his mother, and the baby's mood will be smoothly transferred. 2. If you feel unable to take care of your baby's ability development, you can choose institutional education, such as early education institutions, to help mothers learn how to take care of their baby, instead of simply sending the baby to kindergarten to solve the baby's ability development problem. It is a positive role for the baby to adapt quickly, but because it is separated from the mother very early, it will lead to the rise of unsafe attachment and affect the development of good emotional intelligence, so it is not in favor of the baby under 2 years old entering kindergarten.