Abstract: Based on the Pinus tabulaeformis tree-ring records from Mt. Kongtong, this paper focused on its environment change history. After laboratory approaches like mounting, polishing, cross-dating and high precision measuring, 66 tree-ring cores are used to establish three types of tree-ring width chronologies: standard chronology (STD), residual chronology (RES), and autoregression standard chronology (ARS). Correlation analysis between the chronologies and meteorological observation data shows that the standard tree-ring index has the best correlation with the average temperature of summer. Regression model is also founded according to the analysis results. Different verification results show that the regression model is stable and reliable. The summer average temperature sequence during the period of 1751-2005 is reconstructed, and it exhibits three cold periods: 1764-1785, 1852-1893, 1952-1986 and three warm periods: 1786-1847, 1894-1937, 1987-2004. Comparisons of the temperature with Nino3 index, SOI index and sunspot number suggest that the study area has good response to global climate change and solar activities.

Key words: tree-ring width index, summer average temperature, climate change, Mt. Kongtong