13 apatite fassion track results and modeling identify the history of uplift and exhumation, antiquated topography evolution and three stages in sample cooling history. Stage one records the highest temperature, it is bottom temperature of apatite fission track anneal strip, main part is higher than 100℃ between 120 and 80-70 Ma, from final late cretaceous to early palaeogene period, there is only weak uplift and exhumation, structure is not evident; stage two records rapid cooling to the low temperature part of the fassion track partial annealing from 120-100 ℃ to 35-30 ℃ between 80-70 and 20 Ma, because of Himalayan movement, uplift and exhumation strengthened, mountains uplift and basons droped in late palaeogene especially from mid-late Miocene; final stage records slow cooling process,from 20 Ma to today,temperature goes down from 35-30 ℃ to the temperature of current Earth’s surface. The uplift rates of three stages are 0.025 mm/a，0.027 mm/a and 0.02 mm/a, uplift ranges are 1.14 km，1.34 km and 0.43 km. The uplift range of surface changes between 634 and 2394 m.,average exhumation is 2168 m, uplift 3318 m, the balance of them, 1150 m is average height of the mountain today.