Highway roadbed slope drainage structure

The utility model discloses a highway subgrade slope drainage structure, which relates to the technical field of highway construction, and comprises a highway base body, a drainage channel arranged on the highway base body and a drainage cover arranged on the drainage channel, and an auxiliary drainage unit used for auxiliary drainage is arranged in the highway base body. The auxiliary drainage unit comprises a rotating wheel rotationally connected into the road base body, a plurality of scraping plates are fixedly connected to the rotating wheel, an arc-shaped plate is fixedly connected to one side of each scraping plate, and a first filter screen is installed in the road base body. When the drainage device is used, water flows into the drainage groove, then drainage is assisted through the auxiliary drainage unit, the drainage efficiency is improved, the flexible cleaning structure is arranged in the auxiliary drainage unit, the filtering structure can be cleaned, the drainage effect is improved, when the i