Egongdai landslide body is located in the upstream 1.3km of right bank of Lechangxia reservoir area, the river of reservoir area is narrow, the landslide surge will obviously produce bad effects on the reservoir bank slope and water-retaining dam ect. According to the distribution characteristics of Egongdai landslide body ,the article carried out the hydraulic model test of landslide surge, simulated landslide process and speed, and analyzed the characteristics of landslide surge wave height,overtopping surge water,and surge dynamic water pressure intensity. The result can provide reference for the design and operation of project.