Plasma sewage treatment device and treatment method thereof

The invention provides a plasma sewage treatment device and a treatment method thereof. The device comprises a shell (1), a reaction cylinder (3) is arranged in the shell, a plasma generation electrode (2) is arranged between the shell (1) and the reaction cylinder (3), a water outlet pipe (16) is arranged on the side, close to the upper end, of the reaction cylinder (3), the lower end of the reaction cylinder (3) is connected with a water inlet pipe (12), a gas supply pipe (9) is arranged on the side, close to the lower end, of the reaction cylinder (3), the section of the reaction cylinder (3) is polygonal, and a plurality of aeration stopping blocks (17) are arranged in the polygonal reaction cylinder (3) from top to bottom. The device has the advantages that the plasma discharge distance can be adjusted according to sewage conditions and outflow water, plasma can be formed in different gas-liquid mixed phases, and low-temperature plasma treatment efficiency can be effectively improved. 本发明涉及种等离子体污水处理装置及其处