Silicon carbide brick

The utility model discloses a silicon carbide brick, which comprises a mother brick and a son brick, wherein a group of groove holes are formed in the mother brick, the tops of the profiles of the groove holes are in round shapes, the lower parts of the profiles of the groove holes are in rectangular shapes, the son brick is in a strip shape, in addition, the profile of the son brick is in the same shape as the profiles of the groove holes, and the son brick and the groove holes can be matched. Compared with the prior art, the silicon carbide brick is arranged at a ventilation opening of a heating kin furnace after the insertion matching of the son brick and the mother brick, the use flexibility is enhanced, the trimming is convenient, and meanwhile, the matching combination among the brick bodies is adopted, so the addition of concrete is not needed, and the production cost is reduced.