Novel photocatalysis water treatment system

The utility model relates to a novel photo-catalytic water treatment system, and is characterized in that the water treatment system is composed of a water pump (1), a water treatment device (5), a control module (4), change valves (2-1 and 2-2), three-way valves (2-3 and 2-4) and an ultraviolet lamp tube (8). The output port of the water pump (1) is connected with the input port of the change valve (2-1); the output port of the change valve (2-1) is connected with the water input port of the water treatment device (5) through the three-way valve (2-3); the water output port of the water treatment device (5) is connected with the input port of the change valve (2-2) through the three-way valve (2-4); the signal output end of the control module (4) is respectively connected with the control input port of the water pump (1), the control input ends of the change valves (2-1 and 2-2) and the control input end of the ultraviolet lamp tube (8); and a multilayered photo-catalytic foamed metal component is arranged i