2． School of Ｒesources and Environment，University of Electronic Science and Technology of China，Chengdu 611731，China;

3． China Ｒailway Academy Chengdu Company，Limited，Chengdu 610036，China

treatment scheme design，and landslide prevention engineering． Seismic exploration，as an important geophysical exploration method，plays an critical role in geological disaster evaluation． Traveltime is one of the most frequently used seismic attributes． Among many different traveltime calculation methods，the fast marching method ( FMM) is featured for its advantages in high efficiency，high accuracy and strong stability． In this paper，the velocity models are established according to the real landslide models，and then the topography FMM is applied to these landslide models． The calculation results show that topography FMM outperforms in calculating the

traveltime for landslides．