Microwave penetrating corundum refractory brick for microwave oven

The invention discloses a microwave penetration corundum refractory brick for a microwave oven. The refractory brick comprises a hollow brick body and a buckling plate; the hollow brick body is formed by mixing and sintering corundum, mullite and glass, the proportion of the corundum to the mullite to the glass is 2: 2: 1, and limiting separation blades are arranged on the front sides of the left inner wall and the right inner wall of the hollow brick body; and the buckling plate is a quartz buckling plate, the buckling plate is bonded with the two limiting separation blades at the same time through high-temperature-resistant glue, the buckling plate is matched with the inner edge of the hollow brick body, and the front side face of the buckling plate is flush with the front side face of the hollow brick body. The microwave penetration corundum refractory brick further comprises a heat insulation unit. The microwave penetrating corundum refractory brick for the microwave oven has relatively high microwave pen