The invention discloses easy-cleaning temporary marking automatic spraying paint and a preparation method thereof, the easy-cleaning temporary marking automatic spraying paint is prepared by filling DME into a paint semi-finished product comprising styrene butadiene rubber, rosin modified resin, modified acrylic resin, light-weight calcium carbonate, methylal, a dispersing agent, toner and DMC. A dried paint film has the function of dissolving when meeting water, has the advantages of easy cleaning, no harm to original surface, and the like which other products do not have, and the dried paint film has excellent adhesion capability on dry and smooth cement surface or other surface, and has good smoothness and wear resistance.