The invention relates to a protection brick special for a three-time air valve. The protection brick comprises a body, and the body comprises a first connection block, a second connection block, and at least one screw rod for connecting the second connection block to the first connection block. Nuts matched with the screw rods are arranged in the second connection block and the first connection block. The protection brick has the advantages that the first connection block and the second connection block are assembled through the screw rods to form the body needed by the three-time air valve, and when the brick is used, the body can be directly bricked and constructed, and then is used in cooperation with a three-time air pipe high-temperature abrasion-resisting valve plate. When one of the first connection block and the second connection block is abraded, a user only needs to replace the abraded one, and then the brick can be mounted and used again, the maintenance cost is simplified, the material cost is reduced, the brick is safe and reliable, and the construction period is greatly shortened.