The invention provides a spiral hole type ceramic filter for metal casting. The ceramic filter comprises a spiral hole type channel and two drainage holes, wherein the spiral hole type channel is distributed in a ceramic matrix in a staggered mode. The structure is simple, forming and sintering are easy, and the transportation and the installation are facilitated; the structure of the spiral holetype channel is adopted so that a metal liquid can rotate while flowing forward, a centrifugal force is generated, and the separation of inclusions is promoted; due to the fact that the spiral hole type ceramic filter for metal casting comprises the following chemical components of 90wt%-95wt% of MgO, 4wt%-8wt% of SiO2 and 2wt%-4wt% of ZrO2, the spiral hole type ceramic filter is high in normal temperature strength, good in high-temperature thermal shock resistance and capable of resisting the metal liquid impact at 1700 DEG C or higher without breaking; and each of the surface of the ceramicmatrix and the surface of the spiral hole type channel is provided with a layer of functional oxide coating with the component of CaO.2Al2O3 or CaO.6Al2O3 or Al2O3 or TiO2 or Re2O3, so that the adsorption efficiency of the inclusions is improved.