Highway subgrade compacting device

The utility model provides a highway subgrade compaction device which comprises a movable frame body, a thickness adjusting mechanism is installed above the frame body, a compaction mechanism is installed below the frame body, the compaction mechanism comprises a compaction plate, a first supporting plate and a cam mechanism, the cam mechanism is installed below the first supporting plate, and the thickness adjusting mechanism is installed above the first supporting plate. The cam mechanism is arranged on the first supporting plate, the compacting plate is arranged below the cam mechanism, the cam mechanism rotates to drive the compacting plate to move in a reciprocating mode, and the thickness adjusting mechanism is connected with the first supporting plate and adjusts the compacting thickness of the compacting plate. According to the highway subgrade compaction device provided by the utility model, the cam mechanism eccentrically rotates to drive the compaction plate to do reciprocating motion so as to real