Abstract: In an attempt to probe into the laws of deformation and failure of bank slope in Xiluodu-Baihetan reach of Jinsha River, we obtain the distribution of bank slope structure and lithology in this segment, and analyze statistically the spatial distribution characteristics of 95 deformation and failure bodies through field investigation and interpreting of high-definition aerial image data. Results reveal that deformation and failure of bank slope is the most developed in the thin layer to interlayer structure, and well developed in the upper Ordovician and the Silurian system and other two types of strata. The morphological characteristics of deformation and failure obey the power law. Cumulative frequency is in negative exponential relationship with horizontal projection length and other parameters, and in linear relationship with the logarithm of the density and modulus of deformation failure. When α equals 0.05, the density of deformation and failure of bank slope ranges in 0.038-1.184 points per kilometer, and modulus between 20×10⁴ m³/km and 4 656×10⁴ m³/km

Key words: bank slope structure, deformation and failure, power law, cumulative frequency, Jinsha River