Based on the standard tree-ring width chronology of Pinus koraiensis in the southern Lesser Khingan Mountains, we examined the effects of temperature and precipitation on radial growth and whether these correlations were stable before and after the abrupt warming in 1982. The results showed that the mean temperature in June was extremely significantly negatively correlated with its radial growth throughout the duration of the test. Based on the growth-climate response relationship, the mean temperature in June was reconstructed from 1843 to 1982, which explained 44.3% of the variance in the reconstruction (F=8.730, P<0.005). The warmer and colder periods of the reconstruction sequence lasted 7a (1915-1921) and 29a (1880-1891, 1932-1948), respectively. The reconstructed sequence had an evident 2-7a periodic variation and significantly spatial correlation based on Wavelet analysis and spatial correlation analysis, indicating that it can scientifically represent the temperature change in the southern Lesser Khingan Mountains and their surrounding areas. This study expands the existing regional temperature data, providing a basis for systematical mastery of climate change laws and scientific prediction of the future tendency of climate change in the Lesser Khingan Mountains.