Based on the perspective of existentialism, this paper discusses the essential relationship and interaction between breaking away from life and death cognition, and analyzes the relationship between breaking away from life and death cognition through cases, so as to help individuals to promote life reflection and growth in an open and inclusive manner at the spiritual level and move towards a higher self-realm. Through the reflection and reconstruction of life and death cognition, individuals can face life and death, pay more attention to the essence and internal needs of life, and establish a positive view of life and death, which is beneficial to improve the death literacy of individuals, families and society, promote the formation and harmonious development of social environment, and provide empirical reference suggestions for exploring life and death education and life and death cognition paths in line with China's national conditions.