Abstract: To examine the radial growth responses of Larix olgensis to climate factors under climate change in the north slope of Changbai Mountain, we sampled tree cores from two sites, located at different elevations (900 and 1400 m a.s.l.). The treering width chronologies of L. olgensis were established based on theories of dendrochronology. The relationship between L. olgensis and climate factors in two periods (1959-1993 and 1994-2009) was analyzed. Theresults showed that: (1) A sudden warming occurred during 1959-2009, with a breakpoint in 1993; (2) The response of radial growth of L. olgensis to climate factors varied between different elevations. Tree-ring width was significantly positively correlated with mean temperature of pre-growing season (April) and negatively correlated with precipitation of September at high elevation; while the significantly positive correlation between tree growth and the precipitation of September existed at low elevation; (3) With the rapid warming over the past ten years, the growth of L. olgensis showed significant variations in the response to climate factors. After warming accelerating, at high elevation, the positive correlation between tree growth and temperature of pregrowing season was significantly enhanced, and the negative correlation between treegrowth and mean temperature of the growing season as well as precipitation in September was enhanced. Radial growth ofL. olgensisshowed a decreasing positive response to precipitation in September and an increasing positive response to precipitation in April at low elevation; (4) The basal area increment (BAI) was significantly increased at high elevation, but that at low elevation was not obvious after the accelerating warming since 1993. Therefore, the situation of accelerating warming promoted tree growth at high elevation, but did not affect it at low elevation. It can be predicted that the natural distribution range of L. olgensis will expand with continuing climate warming.