Early childhood primary education refers to the promotion of primary education content and learning methods in early childhood. The harm of early childhood education in primary schools mainly includes the following aspects:

1. Suppress children's nature: children are lively and curious. Premature implementation of primary education will make children lose their nature and inhibit their free exploration and creative thinking.

2. Increase the learning burden: Premature implementation of primary education will increase children's learning burden and make them bear excessive pressure and burden, which may lead to emotional and physical health problems.

3. Affect children's physical and mental development: Early childhood education is an important stage of physical and mental development. If primary education is implemented too early, it may affect children's physical and mental development and lead to problems in their cognition, emotion and social communication.

4. Reduce children's interest in learning: premature implementation of primary education may make children lose their interest in learning and make them resist learning, thus affecting their learning effect and future development.

To sum up, the harm of early childhood education in primary schools is very great, which needs attention and avoidance. Early childhood education should focus on cultivating children's hobbies, imagination and creativity, focusing on cultivating children's physical and mental health and social skills, and providing children with a relaxed, happy and loving growth environment.