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The application discloses a photoelectric coupling device and treatment method for continuously disinfecting and purifying swimming pool water, and belongs to the technical field of swimming pool water treatment. The device comprises an electrochemical treatment unit and an ultraviolet treatment unit which are sequentially connected. The electrochemical treatment unit is provided with a filter assembly, a water pump and an in-situ E-peroxone reactor, and an integrated coaxial electrode is arranged in the reactor. The ultraviolet treatment unit is provided with an ultraviolet reactor with a VUV / UVC light source. The swimming pool circulating water is first subjected to electrochemical treatment and then subjected to ultraviolet treatment to form a synergistic oxidation system. Preferably, the residence time of the electrochemical unit is 5-10 min, the residence time of the ultraviolet unit is 10-15 min, the current density is 10-200 mA / cm 2 , and the ultraviolet dose is 200-1000 mJ / cm 2 . The device is suitable for continuous flow treatment of swimming pool water with a chlorine ion concentration of 200-2000 mg / L, containing urea, creatinine and / or hippuric acid.