The bottom edge of radial service gate installed on the flood and sediment discharge hole with partial opening operation requirements on high sediment laden river is prone to abrasion damage, the conventional restoration methods are time-consuming, and it is difficult to guarantee the restoration quality, which affects the safe operation of flood control facilities of the project. According to the comparison and analysis of abrasion damage, radial gate structure and wear resistant materials, the design scheme of assembled wear resistant radial gate bottom edge structure composed of wear resistant plate and bearing component is proposed. This structure can significantly enhance the wear resistant performance of the bottom edge of the radial gate without reducing the whole strength and stiffness of the radial gate, and can also greatly improve the restoration efficiency and quality of the worn bottom edge. It is not only applicable to recently installed radial gates, but also applicable to the reconstruction of the bottom edge of the existing radial gates.The structure has been put into operation for 4 years in Xiaolangdi Multi-purpose Dam with excellent performance.