The invention discloses a water-reducible silicone coating and a preparation method thereof. The coating comprises multiple alkoxy silane and/or multiple alkoxy oligopolysiloxane, acid or alkali, water or polysiloxane emulsion. The coating of the invention is low in cost; components of the coating are stable during long standing; the coating can be used after being directly mixed with aqueous components; cured coats have high rigidity and excellent hydrophobic, antifouling and antisepticise properties and weatherability; the coat surfaces can have different fine roughness and optical transparency.