The invention provides a multifunctional road maintenance device which comprises a road maintenance vehicle. A garbage storage system and an asphalt processing system are arranged on the road maintenance vehicle, the garbage storage system comprises a garbage storage box, an air extracting pump is arranged at the top of the garbage storage box, a sucker for absorbing pavement garbage and dust is connected to the bottom of the garbage storage box, the asphalt processing system comprises an asphalt storage box and an asphalt extrusion device connected with the asphalt storage box, and a heater for heating asphalt is arranged on the asphalt storage box. The multifunctional road maintenance device has pavement maintenance and cleaning functions, manual pavement maintenance is replaced, road maintenance cost is reduced, and working efficiency is high.