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Ultra-high pressure water jet cleaning marker is the most effective cleaning technology about removing marker. However, the study found that company about ultra-high pressure cleaning is extremely rare in China. Cleaning parameter settings is also no basis. So, this paper introduces the system of ultra-high pressure water-jet cleaning marker, and researches on influence factors of ultra-high pressure water-jet cleaning marker. We use professional image processing software -Halcon to calculate the rate of cleaning as cleaning quality criteria. According to 1 mm normal road marker in our country, the experiment makes a study on three factors which influence cleaning quality - the water jet pressure, target distance, movement speed. It will benefit to improve the efficiency of cleaning, cleaning effect, saving energy and water.