The failure of a landslide in proximity to a reservoir generates impulse waves, leading to significant casualties and property losses. Through presents a comprehensive field investigation and simulation analysis of the potential impulse waves emanating from the Wulipo landslide, which exhibited deformation following the initial impoundment at the Baihetan hydropower station. The results show that Wulipo landslide is characterized as a weak-based, weathered, and fragmented rockslide, with soft rock in the lower section and hard rock in the upper section. The deformation and failure mechanism triggered by the action of reservoir water involves compression, fracturing, and shearing. Periodic fluctuations in the reservoir's water level could potentially initiate a complete slip failure of the landslide. Numerical simulations conducted indicate that, at peak water levels, the overall failure event at the Wulipo landslide is unlikely to cause significant destructive impacts on the neighboring Menggu Community and Ganhu Road. Consequently, engineering measures aimed at reducing the landslide volume can effectively mitigate the potential impulse wave risk posed by Wulipo landslides.