Due to topographic constraints, the filling and excavation of local sections of urban external municipal roads are relatively large. In order to ensure the structural safety of the high fill embankment slope of Wangbaoxin Avenue, through the study of the structural composition and characteristics, reinforcement failure forms, deformation characteristics, and seismic function allocation of reinforced Gabion retaining walls, taking the design scheme of reinforced Gabion retaining walls on Wangbaoxin Avenue in the Luotian County Rural Revitalization PPP Project as an example, and combined with the calculation results of internal stability such as the pull-out stability and tensile strength of the reinforcement strip, the main material performance requirements of reinforced Gabion retaining wall are introduced and its main construction technology is analyzed, which shows that the ultrahigh reinforced Gabion retaining wall has the broad application prospects in the field of high fill embankment slope support of urban external municipal roads because of its advantages of economic durability, ecological environmental protection, land conservation and convenient construction.