Advanced treatment and recycling device and process for toxic chemical wastewater

The invention relates to a toxic chemical wastewater advanced treatment and recycling device and process in the technical field of chemical wastewater treatment, the toxic chemical wastewater advanced treatment and recycling device comprises a treatment tank, the top end of one side of the treatment tank is communicated with a liquid inlet pipe used for introducing wastewater into the treatment tank, and the top of the treatment tank is provided with an oxidant material box containing an oxidant. A plurality of filter screens for filtering water are mounted on the outer wall of the vertical pipe, so that oxidation products in wastewater flowing into the vertical pipe can be filtered out through the filter screens, and liquid passes through the filter screens to move to the top of the water baffle and is finally discharged through the liquid discharge pipe; oxidation products filtered by the filter screen can fall into the sludge containing cavity under the action of self gravity to realize solid-liquid separa