Sewage treatment device

The sewage treatment device comprises a reactor, an aeration device, a power supply, a plurality of partition plates and a plurality of reaction suites, a reaction cavity is formed in the reactor, the multiple partition plates are arranged in the reaction cavity at intervals in the first direction so as to divide the reaction cavity into multiple circulation channels, circulation notches are formed in the partition plates, the circulation notches of the adjacent partition plates are staggered in the second direction, a water inlet and a water outlet are formed in the reactor, the water inlet is communicated with the first circulation channel, and the water outlet is communicated with the second circulation channel. The water outlet is communicated with the last circulation channel; the reaction suites are arranged corresponding to the circulation channel and comprise anodes and cathodes, the anodes and the cathodes are arranged on the two side walls of the circulation channel respectively, and the power sourc