Abstract: According to AFT thermal chronology, the research shows the uplift rate is 29.68 m/Ma，the uplift quantity is 1 944 m，the average reduced temperature is 103.5 ℃，the average gradient of ground temperature is 53.24 ℃/km in Cenozoic of south-eastern slope of Daxing’anling Mountains.In the domain of time, uplift of south-eastern slope of Daxing’anling reveals its act character; its velocity shows 5 lowliness and 4 highnesses. And 4 highnesses are 56.44-49.65 Ma，40.40-31.80 Ma，25.00-17.91 Ma，11.72-4.45 Ma.In the domain of space, the uplift-denudation and topgraphy evolution showed 4 phases. The first phase is pinned divide model whose pin is at FT4 point in 65.50-56.44 Ma. The second phase is downwarp model in 56.44-40.40 Ma. The third phase is pinned divide model whose pin is at FT1 point in 40.40-8.00 Ma. The fourth phase is pinned divide model whose pin is at FT7 point in 8.00-0.00 Ma. The types of topography transformed during the high speed period of the whole uplift.

Key words: Daxing’anling Mountains, Cenozoic, uplift, topography evolution, fission track