The invention discloses a graphene composite sand-in-sand colorful coating and a preparation method thereof, which is characterized in that it is mainly composed of a protective colloid solution, a base paint solution and a continuous phase solution, and the mass ratio of the protective colloid solution, the basic paint solution and the continuous phase solution 1:2:3, the protective gel solution is composed of deionized water, protective rubber powder and bactericidal preservative; the base paint solution is composed of deionized water, cellulose, graphene, defoamer, dispersant, film-forming aid, Antifreeze, pH regulator, protective glue solution, thickener, bactericidal preservative, film-forming resin, curing agent and colored sand; continuous phase solution consists of deionized water, cellulose, graphene, dispersant, defoamer , leveling agent, film-forming aid, antifreeze, bactericidal preservative, pH regulator, film-forming resin and colored sand, the advantage is that it can provide the coating with water resistance, alkali resistance, scrub resistance and color after coating point fusion.