Submerged flexible draining structure on road side slope

The invention discloses a submerged flexible draining structure on a road side slope. Water-proof geotextiles (1) are paved on the two sides and the bottom of a drain ditch; a water-permeating geotextile (7) is paved on the upper part of one side, close to the side slope, of the drain ditch; a soft water-permeating pipe (2) is arranged on and a breakstone layer (3) is filled in the lower part of the drain ditch on which the water-proof geotextiles (1) are paved; and a sheet stone layer (4) is filled on the upper part of the breakstone layer (3) in the drain ditch. The submerged flexible draining structure is high in deformation resistance and still has the draining function when the surface soil body of the side slope (such as an expanded side slope and the like) is expanded and deformed.