Abstract: With the aging becoming more and more serious, how to promote the successful aging of the elderly is a topic worth discussing. Meanwhile,caring for grandchildren is becoming more and more common in China, but its impact on the successful aging of the elderly has not been discussed in depth. Based on the data of China Health and Retirement Longitudinal Study (CHARLS) in 2013, this paper uses multiple logistic regression model to analyze the impact of the intensity and period of caring for grandchildren on their objective and subjective successful aging, respectively, for the young, middle-aged and elderly people. The results show that for the young elderly, the intensity of care for their grandchildren negatively affects their objective and subjective successful aging. For the middle aged people, the intensity of care for grandchildren negatively affects their subjective successful aging, while the period of care negatively affects their objective successful aging. For the elderly, the intensity and period of care for grandchildren have no significant impact on their subjective and objective successful aging.