Iandslide in a certain reservoir area is chosen as the engineering background. According to the saturated-unsaturated seepage equation

the dynamic response of pore water pressure in the landslide influenced by the fluctuation of water level is studied when considering the infiltration characteristics and the fluctuation velocity of water level. The analysis results show that (1) when the water level fluctuates

the saturated permeability coefficient has great impact on the initial water level under the same infiltration condition; with the increase of the saturated permeability coefficient

the water level becomes lower

and the water level line becomes more smooth

which has smaller impact on the dynamic and static pore water pressure

and is good to the slope stability; (2) with the increase of fluctuation velocity of water level

the response of water level lags behind

the water level line becomes steeper

which causes greater dynamic pore water pressure to the slope

and is worse to the slope stability.