Abstract: Apatite fission track is often applied to timing of fault movement, as a typical research method for low temperature thermal reconstruction. Several factors may bring large impacts onto the results of the method, such as the complication caused by mineral characteristics (composition, anisotropy), manipulation procedures, and inversion models. It is even more complicated if taking account of different thermal conductivity of rocks, volcano activities, pore water content of the strata which are closely related to geothermal gradient. In addition, the climatic influence and the tectonic influence of adjacent faults have to be excluded in the fault activity timing. In order to improve the quality of results, we made some suggestions in this paper based on previous researches, such as the solutions to eliminate the interferences related to manipulation procedures, natural cooling and tectonic activity of adjacent faults.