Coking wastewater advanced treatment method and treatment device thereof

The invention discloses an advanced treatment method for coking wastewater. The method comprises the following steps: a, filtering the coking wastewater, and then adjusting the water quantity; b, carrying out ozone micro-nano bubble treatment on the adjusted wastewater to obtain coking wastewater containing ozone micro-nano bubbles; c, the coking wastewater is subjected to a heterogeneous ozone catalytic oxidation reaction under the action of a bimetallic solid-phase catalyst, and organic pollutants in the wastewater are preliminarily removed; carrying out heterogeneous Fenton oxidation reaction on the effluent in the step c under the action of a liquid oxidant and a solid catalyst in combination with the ozone tail gas mixed gas discharged in the step c to further remove organic pollutants in the sewage; performing solid-liquid separation on the wastewater treated in the step d; the problems that in a conventional ozone oxidation method, the ozone utilization rate is low, the wastewater treatment effect is n