Death consciousness is ubiquitous and permeates every aspect of individual behavior and life, and death introspection is an individual's positive coping psychology to death, and it is an important field of death psychology research, which provides a relatively unified explanation for the study of the positive side of death psychology. A small number of studies have revealed the positive effects of death reflection, including happiness. However, in the large range of happiness, previous studies have not explored spiritual happiness, which is highly associated with death and life. Spiritual happiness is an individual's experience of self, social life, nature and supernatural happiness, which mainly involves individual existence, life value and meaning, inner peace, faith and other deep subjective experience. This study explains the influence of death reflection on spiritual well-being by exploring the chain mediating effect of balanced time perspective and existential gratitude. Through death reflection individuals focus on existence from death, existence not only emphasizes the importance of time balance, but also emphasizes the positive role of existential gratitude, and death reflection promotes individuals to achieve spiritual happiness with continuity, consistency and significance.