High speed landslide commonly caused the disaster of air shock wave.In this paper a two-dimensional landslide model sliding the slope is established to simulate numerically flow field characteristics of air shock wave generated by high speed landslide

and its dynamical mechanics is analyzed for the formation.The calculation results show that

with the speed of landslide increasing

the two vortex cavities above the leading edge and rear of landslide body strengthen gradually

and the flow speed also becomes larger.With the landslide body accelerated by its applied force

the flow speed at different height becomes larger in front of the landslide body

the influence distance of air shock wave is further to cause more damage;and the pressure change increases in the high pressure in front of landslide body

the rapid increasing pressure also leads to the speed increasing of air shock wave.Air shock wave generated by high speed landslide could generate the gale exceeding 12class in front of 100mof landslide body to cause extreme damage.This study will provide a scientific basis for preventing the disaster of air shock wave.