Abstract: To discuss the response of different seedling ages of Pinus yunnanensis to the sprouting ability after stumping, P. yunnanensis seedlings aged 6 months, 10 months, 14 months, 18 months, and 30 months were flattened to obtain 5 treatments in this study. The cumulative number of sprouts, net number of sprouts, and sprout length were measured, and the response of their sprouting ability was analyzed every month from 30 days after stumping.The results showed that the cumulative number of sprouts of P. yunnanensis seedlings with different seedling ages after stumping followed a logistic growth process, increasing with the increase of seedling age. The fast-growing point of M6, M10, M14 and M18 were close and appeared in 60 days after stumping, while the fast-growing point of M30 appeared in 116 days after stumping. The number of net sprouts showed a trend of first increasing and then decreasing with growth time, tending to be gentle. Aside from M30 having the largest number of net sprouts at 180 days after stumping, the highest number of net sprouts from other seedling ages occurred at 30 days after stumping. After 240 days of stubble treatment, M6 and M30 showed the highest percentage of effective sprouts out of the total number of sprouts, which were 17.54% and 26.46%, respectively. M6 had a survival rate of 80%, while the survival rate of M30 was only 20.75%, despite the longer cultivation time. The number of effective sprouts in M10, M14 and M18 increased but in much lower numbers than in M6 and M30 at 480 days after stumping. The experimental results indicate that different seedling ages of P. yunnanensis have different responses to the sprouting ability after stumping, stumping at 6 months of seedling cultivation has the better effect and can obtain high-quality sprouts.