Medium-density fiberboard surface shaping machining device

The utility model discloses a medium density fiberboard surface shaping machining device which comprises a workbench, a drainage groove is formed in the top of the workbench, and a flow guide pipe is fixedly installed at the bottom of the drainage groove. By arranging the wastewater treatment backflow device, a fiberboard needing to be processed is placed on the workbench, after processing is finished, water is added into the storage inner box, the water suction pump starts to pump water, the water enters the liquid separation plate for flow separation, and the water is sprayed out through the spray head and is sprayed to the surface of the fiberboard; at the moment, wastewater is guided by a drainage groove and enters a wastewater treatment backflow mechanism through a flow guide pipe, the wastewater is filtered through a first filter screen plate, a second filter screen plate and a third filter screen plate in sequence, and the wastewater enters a storage inner box to be stored for next use, so that the pro