In order to improve the teaching effect of morality and rule of law in primary schools, teachers should fully consider the growth characteristics and laws of primary school students, create experience opportunities, trigger emotional resonance, create effective activities and enrich teaching forms, to make them deeply understand the moral and the rule of law learning content. Therefore, we can design immersive teaching activities, so that students in a dynamic teaching situation, teaching activities in learning. Immersive learning is an extension of situational teaching. The application of immersive activities in moral and law teaching can build learning community and expand learning space. By participating in the whole process of learning and practice, students can optimize the structure of knowledge to enhance the key ability, access to life-long benefits of the core literacy, improve the effectiveness of teaching. This paper expounds the connotation and design ideas of immersive activities, and analyzes the ways of implementing immersive activities in the course of moral and law teaching in primary schools through cases.