Powerful circulating ozone catalytic oxidation and Fenton coupled treatment device

The invention relates to a powerful circulating catalytic ozonation and Fenton coupled treatment device which is internally provided with a catalytic filler and comprises a water inlet and gas distribution area, a reaction area, a water outlet area and an exhaust area from bottom to top, the reaction area comprises an internal upflow area and an external downflow area, and the upflow area and the downflow area are separated by an inner cylinder; a water distribution pipe and an ozone distribution pipe are arranged in the water inlet gas distribution area; a material in the up-flow area flows from bottom to top under the action of inlet water and inlet gas, a three-phase separation device is arranged at the top of the inner barrel and is used for carrying out three-phase separation on the material flowing to the top of the up-flow area, and meanwhile sewage and catalytic filler at the top of the up-flow area are input into the down-flow area, so that the material in the down-flow area flows from top to bottom;