Generally, this situation is caused by children's fear. Babies will feel uncomfortable and scared in unfamiliar environment or small space. We can enter the classroom as soon as possible and wait for more and more of his classmates. When the child begins to have fear, the mother should quickly deal with the child's emotions in a * * * way, telling him that the mother knows that you are afraid, that the mother will accompany you, recognize his emotions, and don't leave the classroom in a hurry. Pick him up and walk around the corner of the classroom. If the child's crying will not affect class, try not to leave the classroom. If the child is crying badly, you can take her to a spacious place to calm down and gradually adapt to this environment. The baby will be fine.