Highway construction pavement cutting device

The utility model discloses a road surface cutting device for highway construction. The device comprises a base, wherein an adjusting mechanism is mounted on the surface of the base; a hydraulic rod is arranged in the adjusting mechanism; the hydraulic rod is fixed in the base; a diesel engine is fixed at the top end of the hydraulic rod; a carrying plate is fixed to the surface of the diesel engine, a guide pipe is connected to the surface of the carrying plate in an embedded mode, a threaded rod is connected into the guide pipe, a rotating shaft is fixed to the bottom end of the threaded rodand fixed into the base, a rotating shaft is fixed to the surface of the diesel engine, and a cutting blade is fixed to the other end of the rotating shaft. According to the pavement joint cutting device, under the action of the adjusting mechanism, the height of the diesel engine can be adjusted through the arranged hydraulic rod, so that the rotating shaft is driven to do lifting motion, the cutting blade is driven to