Forty-eight field data of parameters and fracture developments of typical rockslides in Three Gorges Reservoir were collected. On the basis of following similar guidelines, a three-dimensional physical model of impulse waves generated by cataclastic rockslides in shallow water area was established based on the topography data of the Wanzhou Rive section. In terms of many model tests, measure movement characteristics on the water of rockslides with different shapes and volumes, landslide submergence ratio and maximum near-field wave amplitude. The testing results show that the fractured rock mass produces a velocity gradient along the landslide thickness direction, causing the rock mass to slide layer by layer to the water. The maximum landslide thickness decreases exponentially with the increasing sliding distance. In addition, when the submergence ratio is less than the landslide limit submergence ratio, the near-field amplitudes will decrease sharply with decreasing water depth. The predictive equations were derived using a multi-variable regression analysis of the dimensionless parameters, giving the attenuation equation for the maximum landslide thickness, the empirical equation for landslide submergence ratio and the predictive equation for maximum near-field wave amplitude generated by three-dimensional shallow-water rock landslide. The applicability of predictive equations is validated by the field observation data of Hongyanzi and Gongjiafang cases.