Iridium-plated brown corundum abrasive is made by using high-quality brown corundum as raw material for deep processing, heating at high temperature, and hot plating iron oxide on the surface of the abrasive. The product has a large surface area, strong hydrophilicity, uniform particle size, high purity, strong adhesion, high grinding efficiency, and good heat dissipation performance. Compared with ordinary brown corundum, iridium-plated brown corundum has significantly improved toughness, microhardness, hydrophilicity, and grinding efficiency. Iridium-plated brown corundum is particularly suitable for the production of high-end coated abrasives and high-end resin grinding wheels.