Dry and hot valley region road structure with water retention and scour prevention functions

The invention discloses a dry-hot valley area road structure with water retention and scour prevention functions, which comprises an embankment roadbed, a base layer and a surface layer which are arranged from bottom to top, two slope surfaces of the embankment roadbed are both provided with scour prevention and water retention layers, a plurality of permeation pipes are arranged between the embankment roadbed and the scour prevention and water retention layers, and two sides of the surface layer are both provided with water storage ditches. A water supplementing ditch is arranged at the lower end of the water storage ditch, and the upper end of the permeation pipe is communicated with the lower end of the water supplementing ditch; the lower end of the water supplementing ditch communicates with a plurality of lifting sliding grooves, and one side wall of each lifting sliding groove is an evaporation adjusting layer. A water absorption expansion bag is placed in the lifting sliding groove, a lifting sliding