Provided is a flexible composite ceramic heat conduction material and a preparation method thereof. The material is prepared from, by weight, 45-52 parts of magnesia ceramic powder, 38-42 parts of tungsten carbide powder, 10-15 parts of titanium diboride powder, 10-15 parts of zirconium dioxide powder, 8-12 parts of metal copper powder and 1-2 parts of modified clay. The heat conduction material is formed by compounding multiple high-heat-conductivity materials, therefore, the heat conduction coefficient of the heat conduction material is 60%-70% higher than that of a common ceramic heat conduction material, the interior of the material is compact, and thermal stress is small; a nitrided case of 1 mm to 2 mm is formed when the surface of the material is sintered, so that the surface is hard, and corner chipping or cracking is not prone to occur; the heat conduction material is good in cold and heat resistance, has certain flexibility, is high in bending resistance, is applied to electronic products, such as mobile phones, notebook computers and cameras, and can achieve a very good heat radiation and cooling effect, the heat conduction material is small in surface adhesive force and is not prone to be contaminated with dust, and heat conduction performance cannot be influenced after a long time.