Abstract: Fission-track analysis as a geological dating ades there has been a major expansion in application to tool was first proposed in the early 1960s. In the past decmore general geological problems. It reflects progress in understanding the temperature dependence of fission-track annealing and in interpreting the information contained in fission-track length distributions. The length distribution of projected tracks can be successfully applied to thermal analysis despite the fact that it is heavily biased against the real length distribution. A partial track annealing concept based on the projected length distribution is proposed, which provides detailed information on the low-temperature thermal histories of rocks, below - 120℃ for tracks in apatite and below - 350℃ for zircon. Fission-track dating technique has been applied to a variety of tectonic problems, including ： （ 1 ） to determine the uplifting time and rate of orogenic belt ; （2） to study the thermal history of orogenic belt ; （3） to date the rapid unroofing or cooling event,（4） to date the time of the basin inversion; （5） to unravel a long-term multi-event thermal record in basement rocks of the basin; and （6） to research the coupling process between basin and mountain.