The invention discloses a cleaning vehicle for assisting a wellhead operation, which comprises a base, a rotating pedestal, two mud scraping support brackets, mud scraping boards, semicircular ring water tubes, and a pump body. The rotating pedestalis perpendicularly fixed on the base; one ends of the two mud scraping brackets are rotatably connected to the rotating pedestal, and the other ends ofthe two scraping brackets can be mutually locked; the mud scraping boardsare fixed to the lower parts of the mud scraping brackets and capable of elastic deformation, and concave curved surfaces usedfor passing drill columns are arranged on the inner edges of the mud scraping boards; the semicircular ring water tubesare fixed to the upper parts of the mud scraping support brackets and provided with spray nozzles; and the pump body is arranged on the base, the water inlet of the pump body is used forconnecting witha water source through a water suction tube, and the water outlet of the pump body is connected withthe semicircular ring water tubes through a water injection pipe. The cleaning vehicle for assisting the wellhead operationhas the characteristics of being simple in structure, convenient and flexible in use, and low in manufacturing and maintenance costs;mounting is unneeded during using,the cleaning vehicle for assisting the wellhead operationonly need to be pushed away froma wellhead after using, the environment of the operation of wellbay drill liftingis greatly improved under the premise of ensuring low-cost operation, and the efficiency of wellhead operation is improved.