The invention discloses a ceramic insulation board, which is prepared from the following raw materials in parts by weight: 9 to 14 parts of feldspar, 3 to 10 parts of fluorite, 6 to 8 parts of carborundum, 4.5 to 10 parts of glycerol trioleate, 4 to 8 parts of silicone acrylic emulsion, 1 to 4 parts of fire retardant, 6 to 13 parts of bowlder powder, 2.5 to 7 parts of montmorillonite, 1 to 5 parts of modified clay, 6 to 13 parts of ceramic fiber, 2 to 5 parts of boron nitride, 4.2 to 7 parts of bauxite clay, 3.5 to 9 parts of medical stone, 4 to 9 parts of fused alumina zirconia ceramic balls, 2 to 6 parts of perlite, 3 to 11 parts of reclaimed rubber, 4 to 10 parts of ceramic powder and 6 to 9 parts of foaming agent. The ceramic insulation board disclosed by the invention has the beneficial effects that the insulation effect is very good, the deformation coefficient is small, ageing is resisted, and meanwhile, the fireproofing grade is high, so that the use demand can be better met.