Abstract: The two tree-ring samples collected from Qilianshan Mountain belong to Sabina przewalskii Kom.According to the data on the tree-rings of Sabina przewalskii, the change of the temperature during the nine hundred years, and that of the precipitation during the recent three hundred years have been analysed. According to the data on the combination of the temperature with the precipitation at the same time, it has been shown that two glacial advences separated by three glacial recession occurred in the Qilianshan region during the recent three hundred years.