Emotion plays an irreplaceable role in people's psychological activities. It is the evocator and organizer of people's cognition and behavior. This effect is particularly prominent in children. Children's behavior is often full of emotions. Happy emotions often make them willing to learn, while unhappy emotions can lead to various negative behaviors. Therefore, some people call young children "emotional prisoners". With the progress of society and the deepening of related research, the importance of children's emotions has been concerned by many people. However, in the process of daily life, games and teaching in kindergartens, due to various reasons, such as teachers' ideological concepts and role orientation, trivial and busy teaching protection work, teachers will undoubtedly inhibit in-depth observation of children and understand their emotional needs, thus leading to the existence of some negative emotions, which is very harmful to the development of children's healthy psychology. Early childhood is the foundation of a person's physical and mental health. If we can pay attention to cultivating children's positive emotions from an early age, it will contribute to the formation of children's healthy psychology and even contribute to their future happiness. Therefore, I try to adopt some strategies to cultivate children's good mood according to the different actual situation of each child in teaching work.