To explore the quantitative characteristics of Quercus glandulifera var.brevipetiolata population in Foping National Reserve of Qinling Mountains,the age structure of the population was analyzed.A time-specific life table was constructed,then the survivorship curve and the mortality curve of the population were analyzed,and survival analysis and spectral method were subsequently conducted,which was based on the data from flied experiment and was carried out by means of space-for-time substitution.The results showed that:(1)There were abundant young and middle-age individuals in the population,while few old ones.The age structure of Q.glandulifera var.brevipetiolata showed reversed-J-shaped distribution and therefore it belongs to the growth type.(2)There were two peaks of mortality in Ⅰ(DBH 0-5 cm) and Ⅵ(DBH 25-30 cm) age classes.The life expectancy showed the highest value in Ⅱ(DBH 5-10 cm) age class.The survivorship curve is the Deevey type Ⅱ,which is indicated that the population was in a stable state.(3)The population dynamics showed periodic and the minor period coexist with the main period.The results suggest that Q.glandulifera var.brevipetiolata population showed a steady increase.