Estimation method, device and equipment of slope instability scale and storage medium

The invention discloses a slope instability scale estimation method, apparatus and device, and a storage medium. The method comprises the steps of obtaining a digital elevation model and point cloud data of a slope; establishing a three-dimensional finite element model of the slope according to a first preset algorithm based on the point cloud data; performing parameter assignment on the three-dimensional finite element model based on rock mass mechanical parameters, and performing stability numerical simulation on the three-dimensional finite element model after parameter assignment; acquiring a plastic failure area of the three-dimensional finite element model according to a stability numerical simulation result, and defining the plastic failure area as a potential collapse source; extracting the section of the slope based on a digital elevation model to perform slope parameter inversion; intercepting a preset number of sections of a potential collapse source, and obtaining the maximum influence range of al