An electric cleaning apparatus, in particular a cleaning disc for such an electric cleaning apparatus, which aims to solve the problems in the prior art of uneven water output of a cleaning disc of a cleaning apparatus and a small water output amount adjustment interval thereof and facilitates the cleanness of the cleaning disc itself. The cleaning disc comprises an outer brush disc (1), wherein the outer brush disc (1) is provided with a recessed cavity (3) for accommodating an inner brush disc (2); and at least two first water output channels (6) are circumferentially distributed at the bottom of the recessed cavity (3) at an interval, the first water output channels (6) extend toward the center from the edge of the bottom of the recessed cavity (3), and a second water output channel (8) for cleaning the recessed cavity (3) is provided between every two adjacent first water output channels (6). By means of the design, the flowing area of a water flow in the recessed cavity (3) is increased, thereby ensuring that every corner of the recessed cavity (3) can be flushed by the water flow during rotation. After use, the added second water output channel (8) can ensure that sewage is fully discharged, and the effect of cleaning the interior of the brush discs without disassembling the cleaning disc is achieved.