Road signs to maintain road traffic order, guarantee the road traffic safety has an irreplaceable role. There must be accompanied by the change of traffic control scheme, the original road marking cleared. At present, the technology of the line is improved in the direction of the environmental protection, high efficiency, automation. Be cleaned surface not only without any marking paint residue, also won't have any damage at the same time, the whole road will become very clean. Ordinary small high pressure water jet cleaning machine in the cleaning process will produce a large amount of waste water, the water may cause the road is not health, or to infiltrate in the porosity of the asphalt pavement material damage. Be cleaned surface instead of high pressure water jet QingChuFa line, any marking paint residue, also won't have any damage at the same time, the whole road will become very clean. Ordinary small high pressure water jet cleaning machine in the cleaning process will produce a large amount of waste water, the water may cause the road is not health, or to infiltrate in the porosity of the asphalt pavement material damage, therefore in the process of cleaning should be equipped with corresponding cleaning equipment. At present, foreign high pressure water jet cleaning machine design are relatively precise, equipped with complete, such as in high-pressure spray nozzle at the cleaning device, so as not to affect the road environment, again, such as system pressure are adjustable, in order to realize the different marking paint cleaner.