| Nostalgia is an emotion and behavior which comprises positive, negative or mixed affects. People frequently experienced. It has many positive psychological effects: improves mood happiness, improves self-esteem and self-efficacy, constructs the meaning of life sense and perceives more social support. The positive role of nostalgia provides an effective way to enhance subjective well-being. For different groups, the impact on SWB nostalgia will vary. On the basis of previous studies, this paper conducted three studies: First, The role of nostalgia trait played in subjective well-being and weather gratitude trait act as an mediator; Second, the state of nostalgia impact on SWB and gratitude as a mediator, we also examine nostalgia state and nostalgia trait’s interaction on SWB; Third, the role of gratitude played in subjective well-being. A total of 386 college students participated in the study, the findings are as follows:1. State of nostalgia mainly affect emotional dimension of SWB, impact on the cognitive dimension is not significant, and a high state of nostalgia may play a positive role in SWB. Gratitude state is a mediator between nostalgia state and emotional happiness.2. State and trait nostalgia has a significant interaction on negative emotions, life and satisfaction. More than that, the main effects of both nostalgia state and nostalgic trait were significantly on negative emotions; the effect of nostalgic state on life satisfaction was not significant while the interaction and the main effect of nostalgia trait are significant.3. Gratitude has a significant impact on the SWB. |