It is difficult to regulate the high-gradient gravel river due to the special bed form and flow condition.The facilities over the river such as levee engineering and bank protection project are often damaged at serious flood，but the research on it is less.The high-gradient gravel river is characterized by shallow water depth，indistinguishable shallow and channel，steep gradient，large flow velocity and plume easily formed when flow is dispersed in the dry season.According to the scour features，we design the generalized model test about different bed material gradation，different scour angle，different riverbed gradient and different discharge.Based on the single factor analysis，we find out main influential factors with 81 groups of experimental data that the scour depth (Hp) is proportional to the single discharge (q)，the channel slope (J)，and the scour angle (θ)，and it is inversely proportional to the composition of bed material particles (D).By the dimensional analysis and multivariate regression analysis methods，we achieve the simple formulas about scour width and scour depth for the high-gradient gravel river.