Pavement flattening device for highway engineering

The utility model provides a road surface flattening device for highway engineering, which comprises a vehicle body, a driving wheel, a power mechanism, an operation room, a pressing wheel, a water tank and an infrared distance measuring sensor, the power mechanism is started by starting the driving mechanism, the power mechanism drives the driving wheel to move through a connecting rod, and the pressing wheel moves through the movement of the driving wheel to finish the flattening of a road surface. The water adding switch is turned on, water flows from the water tank to the pinch roller to increase the weight of the pinch roller, the water reducing switch is turned on, water in the pinch roller flows into the water inlet pipe through the water outlet of the pinch roller and then flows tothe water inlet of the water tank, and therefore the weight of the pinch roller is reduced when the water enters the water tank. The road surface flattening device solves the problems that an existing road surface flattening