Concrete asphalt pavement roadbed reinforcing device

The utility model relates to the technical field of road subgrade reinforcement, and discloses a concrete asphalt pavement subgrade reinforcement device which comprises two arch-shaped beams used for supporting, second damping pieces are arranged at the adjacent ends of the two arch-shaped beams, fixing plates are installed at the bottoms of the second damping pieces, and fixing plates are fixedly installed at the ends, away from the second damping pieces, of the two arch-shaped beams. According to the device, the threaded rod is arranged to rotate, the sleeve is driven to ascend and descend, the sleeve ascends and descends to drive the first connecting piece installed on the surface to ascend and descend, the first connecting piece drives the connecting rod to move, and the connecting rod drives the second connecting piece to move; the second connecting piece drives the clamping piece to move, when the sleeve moves downwards, the clamping piece moves away from the sleeve along a straight groove formed in the