Objective To understand the experiences of inter-generational raising in rural migration older adults, so as to provide reference for the studies on their physical and mental health and quality of life from the perspective of positive psychology. Methods The descriptive phenomenological method was used to conduct semi-structured interviews with 13 inter-generational raising of rural migration older adults, and Colaizzi′s 7-step analysis was used to summarize, analyze and refine themes. Results A total of 5 themes were extracted: family responsibility, social adaptation (migration barrier, adapt well), burden and distress (role conflict, negative emotions and physical discomfort), lack of care information, self-identification. Conclusion Negative feelings exist in the inter-generational raising of rural migration older adults, and they also show a strong sense of accomplishment and value. The family and society should pay attention to the negative feelings of the elderly, and explore positive factors from the perspective of positive psychology to promote their physical and mental health.