Road edge drainage blind ditch and construction method thereof

The invention belongs to the technical field of road drainage, and discloses a road edge drainage blind ditch construction method. Digging a blind ditch; a waterproof layer is painted; color strip cloth is laid; installing a water collecting pipe; blind ditch prefabricated parts are installed; the water collecting pipe is connected with the prefabricated part; water-permeable geotextile is laid on the surfaces of the water collecting pipes and the prefabricated parts respectively, and gravel water-permeable layers are laid on the surfaces of the water-permeable geotextile respectively; paving an asphalt concrete surface layer on the surface of the gravel permeable layer on the surface of the seepage ditch, performing mechanical compaction, and performing soil layer backfilling on the surface of the gravel permeable layer on the surface of the blind ditch, so that the height of the backfilled soil layer reaches the original ground height to finish construction. The excavation area of the cracks on the surface