The invention discloses an industrial wastewater catalytic reactor. The industrial wastewater catalytic reactor comprises a treatment tank, the treatment tank is internally divided into an emulsion reaction cavity and a catalytic reaction cavity from top to bottom, a wastewater pipe and a reagent pipe are arranged at the upper part of the treatment tank, a first drive motor is fixedly installed atthe upper part of the treatment tank, a first stirring paddle extending into the emulsion reaction cavity is driven at the tail end of the first drive motor, and a connecting frame is integrally formed at the lower part of the first stirring paddle. The device uses the emulsion reaction cavity and the catalytic reaction cavity to conduct the two stages of reactions on the wastewater, the device can be used to conduct catalytic reaction on the specific substance in the wastewater, and an emulsion layer produced by the substances like an oil liquid is prevented from polluting the reactor and affecting the reaction speed, so that the treatment speed of the wastewater is effectively accelerated, and the maintenance cost is lowered.