The present invention belongs to the technical field of industrial wastewater purification, and particularly relates to a wastewater purification apparatus and a wastewater treatment process. The wastewater purification apparatus is characterized by comprising a wastewater box, an oil-water separation device, a flocculation tower, a press filter, an aeration tower, a catalytic oxidation tower, an ultra-filtration tank, and a purified water tower, wherein the wastewater box is connected with the oil-water separation device through a pipeline, the bottom portion of the wastewater box is connected with the outlet of the press filter through a pipeline, the flocculation tower and the press filter are connected through a circulating pipeline, the outlet of the flocculation tower and the inlet of the aeration tower are connected through a pipeline, the bottom end of the flocculation tower is respectively connected with the bottom end of the aeration tower and the bottom end of the catalytic oxidation tower, the outlet of the aeration tower and the inlet of the catalytic oxidation tower are connected, the outlet of the catalytic oxidation tower and the inlet of the ultra-filtration tank are connected, and the ultra-filtration tank and the purified water tower are connected. The wastewater purification apparatus and the wastewater treatment process of the present invention have the following beneficial effects that: the super oxidation method is used, the industrial wastewater can be treated to achieve the colorless and clarified state so as to achieve the industrial water and reuse, and the State Environmental Protection Agency standards are met.