To discuss the relation between social participation and successful aging of senior citizens. Convenient sampling and door to door interview were used to choose 360 subjects and questionnaires about social participation and successful aging were given to them. The results are listed below: O In general, successful aging is of the middle level Age, location, living condition and education background have big influence on successful aging. And it's difficult for people who are of older age, living alone, with a low level of education and income...