NOVELTY - An urban river step ecological revetment facility comprises a step revetment comprising an upper platform (1) and a lower platform (2). The upper platform is provided with an overflow well (3) and an overflow pipe (4). The lower platform is provided with a coverway sewage combination processing unit having a water inlet area (5), a settling region (7), and an artificial wetland area (9).    USE - An urban river step ecological revetment facility used for purifying an overflow sewage (claimed).    ADVANTAGE - The facility guarantees safety of flood control and flood relief.    DETAILED DESCRIPTION - An urban river step ecological revetment facility comprises a step revetment comprising an upper platform (1) and a lower platform (2). The upper platform is provided with an overflow well (3) and an overflow pipe (4). The lower platform is provided with a coverway sewage combination processing unit having a water inlet area (5), a settling region (7), and an artificial wetland area (9). The water inlet area is provided with a transcendental port (11). The inlet and the outlet of the settling region are respectively provided with a water inlet water distributing lattice wall (6), and a water outlet water distributing lattice wall (8). A bottom part of the artificial wetland area is filled with gravel, coarse sand, or soil. An upper part of the wetland area is provided with Cypella herbertii, willow herb, cattail, Canna, or sod. An end of the artificial wetland area is provided with a drainage pipe (10). An INDEPENDENT CLAIM is included for constructing the urban river step ecological revetment facility.    DESCRIPTION OF DRAWING(S) - The drawing is a sectional view of the facility.    Upper platform (1)    Lower platform (2)    Overflow well (3)    Overflow pipe (4)    Water inlet area (5)    Water inlet water distributing lattice wall (6)    Settling region (7)    Water outlet water distributing lattice wall (8)    Artificial wetland area (9)    Drainage pipe (10)    Transcendental port (11)