The invention discloses a large-size ceramic rock plate which has a surface area of 3-12m<2> and a thickness of 12-30mm. The large-size ceramic rock plate comprises a green body layer, a ground coat layer, a pattern layer and a cover coat layer; wherein the thickness of the green body layer is 11.5-29.5mm; the green body layer is mainly prepared from the following raw materials by weight: 15-20 parts of potassium feldspar, 8-15 parts of albite, 15-20 parts of calcined kaolin, 12-20 parts of black mud, 8-15 parts of white mud, 15-20 parts of pyrophyllite and 1-10 parts of a toughening agent; wherein the sum of the weight parts of the raw materials is 100 parts. The ceramic rock plate can well adapt to a later deep processing technology, can be widely applied to the fields of floors, curtainwalls and veneers, and has the advantages of high strength, high hardness, acid and alkali resistance, high temperature resistance and the like.