Novel catalytic rectifying tower

The utility model relates to a catalyzing rectifying tower. The utility model comprises a rectifying section, a catalyzing reaction section, and a stripping section, wherein, especially, the catalyzing reaction section has a structure of two layers of concentric cylinders; a catalyst bed, a porous supporting plate, a fence mesh, and a spacer plate are arranged in and outer cylinder; a multistage column plate, a downcomer for liquid phase to enter and leave a column plate zone, and a novel cap cover on the column plate are arranged in an inner cylinder. When the utility model is used, catalyst can be sufficiently used, and contact time of vapor phase and the liquid phase is long. The utility model has the advantages of high efficiency for the column plate.