Granite texture ceramic tile and preparation method thereof

The invention discloses a granite texture ceramic tile and a preparation method thereof. A green body of the granite texture ceramic tile is prepared from the following chemical components in percentage by mass: 68 to 70 percent of SiO2, 18 to 19 percent of Al2O3, small than 1.0 percent of Fe2O3, small than 0.3 percent of TiO2, small than 0.5 percent of CaO, small than 1.5 percent of MgO, 2.5 to 2.8 percent of K2O, 2.0 to 2.5 percent of Na2O and small than 4.5 percent of ignition lost; a ground coat of the granite texture ceramic tile is prepared from the following raw materials in percentageby weight: 35 to 40 percent of potash feldspar, 8 to 10 percent of zirconium silicate, 10 to 15 percent of calcined kaoline, 7 to 10 percent of zinc oxide, 5 to 8 percent of barium carbonate, 13 to 17percent of barium carbonate and the balance of additives; overglaze raw materials of the granite texture ceramic tile are high temperature matte dry grains with mesh numbers of 10 to 120; the firingtemperature of the granite