Objective: To analyze the impact of intergenerational care on child physical health, so as to provide references for promoting the overall development of children s health. Methods: Based on the 2016 national data of the Chinese Family Tracking Survey, descriptive statistics, Mann Whitney U test, Kruskal-Wallis H test and OLS regression analysis were used to explore the relationship between health status of 4 226 children aged 0-14 and intergenerational care. Results: OLS regression analysis showed that intergenerational care had a significant impact on physical health of preschool children (t=-2.11,P=0.04), but had no significant impact on the health of school-age children (t=-0.58,P=0.56). Annual family income, family population size, age and gender of caregivers had a significant impact on the health of preschool children (P<0.05).The self-rated health of caregivers and whether children participated in medical insurance had a significant impact on the health of all children (P<0.01). Conclusion Intergenerational care has a significant impact on the health status of preschool children, but has no impact on the health status of school age children. Attention should be paid to the health of caregivers, medical insurance condition and the impact of physical exercise on children’s health, as well as the health literacy improvement of child caregivers, and children’s medical insurance and welfare.