NOVELTY - Artificial wetland device for processing domestic sewage comprises a precipitation tank (9), a main wetland tank (11), a water tank (12) gradually arranged from the upstream to downstream water level, and an overflow tank (4) set between each tank. The precipitation tank lower end and upper end are respectively provided with a sewage water inlet (8) and a water overflow port. The wetland tank, lower end and upper end are respectively provided with a sewage water inlet and an overflow port. The water tank lower end and upper end are provided with a sewage water inlet and a water outlet.    USE - The device is useful for processing domestic sewage.    ADVANTAGE - The device comprises processing tanks, which are independent at each stage of processing, and can be removed easily as the tank plates are straight, when need arises to disassemble the device.    DETAILED DESCRIPTION - Artificial wetland device for processing domestic sewage comprises a precipitation tank (9), a main wetland tank (11), a water tank (12) gradually arranged from the upstream to downstream water level, and an overflow tank (4) set between each tank. The precipitation tank lower end and upper end are respectively provided with a sewage water inlet (8) and a water overflow port. The wetland tank, lower end and upper end are respectively provided with a sewage water inlet and an overflow port. The water tank lower end and upper end are respectively provided with a sewage water inlet and a water outlet. The overflow port of the precipitation tank is connected with the sewage water inlet of the main wetland tank via the overflow water tank. The main wetland tank overflow port is connected with the sewage water inlet of the water tank through the overflow tank. The water inlet of the precipitation tank, the wetland tank and the water tank are filled with water filtering substrate.    DESCRIPTION OF DRAWING(S) - The diagram shows a schematic representation of the artificial wetland device for processing domestic sewage.    Overflow tank (4)    Sewage water inlet (8)    Precipitation tank (9)    Main wetland tank (11)    Water tank (12)