This article briefly introduces the research and application status of a composite soil nail support type composed of soil nail support, reinforced soil (improvement), and facade light retaining wall. It provides a complex failure mode of compacted fill slope. Based on an overview of the hydrological and geological conditions of a certain project in Luoyang, the technical scheme and construction method of using the composite soil nail support mentioned above are introduced, and its stability is evaluated based on monitoring results and macroscopic observations