DK-TCO catalyst for carbon monoxide removal is mainly used to remove trace carbon monoxide from ethylene or nitrogen in polyolefin industrial production. The catalyst has the advantages of deep carbon monoxide removal depth (0.1× 10-6V/V), high mechanical strength, good selectivity (no addition, polymerization and other side reactions occur during ethylene refining), wide reaction temperature (70-130℃), convenient operation and stable multiple regeneration performance.