The invention provides a high-intensity decoration material and a preparation method thereof. The high-intensity decoration material comprises the following components: bentonite, aluminum oxide, medium-alkali glass fibers, silicon dioxide, a sintering additive, a dispersing agent, an adhering agent, a stabilizer and deionized water. The decoration material prepared according to the method is highin hardness, toughness and corrosion resistance, high in adsorption performance, low in material cost, simple in preparation method, good in market prospect, and suitable for large-scale popularization and use.