With the accelerating aging population and increasing average life expectancy，research on healthy life expectancy has received extra attention. This work utilized data from the 18-year-old population in Nanjing in 2023. Based on the self - reported health standards and GALI as health standards，the study used the CHOPIT model to estimate the disability measures. Furthermore，this study used the Sullivan method to calculate the health life expectancy in Nanjing. Our results indicate that：（1）Under both health standards，the adjusted disability measure shows an upward trend with age. As expected，the disability measures for females are higher than those for males. The corrected data is consistent with the population’s health status.（2）The healthy life expectancy under self-reported health standards is significantly lower than that under GALI health standards，and the gap is more pronounced in the older age group.（3）Under both health standards，the proportion of healthy life expectancy for females is smaller than that of males，and older female adults have poorer health status. Based on these findings，this study recommended focusing more on research regarding gender differences and healthy life expectancy，aiming to improve health levels and enhance the healthcare service system for older adults.