The current landscape of Xiangshan uranium orefield is characterized by the typical eroded low mountain area. The erosion distribution clearly shows that the orefield are still in the stage of surface erosion. The mochronological dating was used to studying the uplift processes of the orefield. Fission track age of apatite from 7 porphyroclastic lava samples are (78.7 ± 7.1)~(34.5 ± 4.1) Ma, the elevation weighted average age 61.1 Ma. Cooling rate of the porphyroclasts lava is 7.6 ℃/Ma during 140.3-61.1 Ma period, and 1.2℃/Ma, 54 m/Ma in 61.1 Ma-modern period. It is inferred that thickness about 3.3 km have been eroded away from the orefield in Cenozoic era.