Line when choosing road line method, main advantages and disadvantages of comparative analysis of various kinds of line technology. 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. Line technology 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. From pure consider economy in the past, to comprehensive consideration of the influence of road traffic, and construction personnel safety, environmental protection requirements. According to different actual situation, choose suitable line technology and formulate reasonable construction scheme.