The invention discloses a ceramic material. The ceramic material comprises a ceramic layer and a cover layer coated on the back of the ceramic layer, wherein the ceramic layer comprises a first phase and a second phase; the first phase comprises zirconium oxide and yttrium oxide; and the second phase comprises aluminum oxide. According to the ceramic material, the yttrium oxide is utilized to stabilize the zirconium oxide, and the aluminum oxide is used as a heterogenous whitener. The ceramic material has the advantages of high hardness, high strength, higher dielectric constant and favorable shading effect, and can be used in the field of fingerprint identification electronic devices. The invention also discloses a preparation method of the ceramic material.