Test device for treating petroleum hydrocarbon pollutants in underground water and application of test device

The invention relates to a test device for treating petroleum hydrocarbon pollutants in underground water and application of the test device, and belongs to the technical field of underground water pollutant treatment. The test device comprises a sewage container, a submersible pump, an oxidant container, an oxidant injection pump, an overflow groove, a reaction column and a filter inner core, wherein a sewage injection port is formed in the head end of the reaction column; a liquid outlet is formed in the tail end of the reaction column; the reaction column is filled with a seepage medium; anoxidant injection pipe, a sampling port and a filter inner core are sequentially arranged in the direction from the sewage injection port to the liquid discharge port; the oxidant container is connected with the interior of the reaction column through the oxidant injection pump and the oxidant injection pipe; the sewage container is connected with the sewage injection port through the submersiblepump; and the overflow gr