The invention discloses a spoiler. The spoiler comprises an annular pipe, wherein a plurality of drainage nozzles are uniformly distributed on the annular pipe; the plurality of drainage nozzles are obliquely arranged along a clockwise direction or an anticlockwise direction of the annular pipe at the same time. The invention further discloses a low-energy-consumption, anti-pollution and environment-friendly ecological flat plate ceramic membrane device; the low-energy-consumption, anti-pollution and environment-friendly ecological flat plate ceramic membrane device comprises a raw water feeding system, an MBR (Membrane Bioreactor) concentrated water tank and an MBR clean water tank; the MBR concentrated water tank is internally provided with a flat plate ceramic membrane assembly and the spoiler; the spoiler is connected with the raw water feeding system through a pipeline; the flat plate ceramic membrane assembly is connected to the MBR clean water tank through a pipeline; the spoiler is arranged around a space structure of the flat plate ceramic membrane assembly. The concentrated water tank is internally provided with an efficient spoiler device and a flat plate membrane can be washed in all directions; accumulated pollutants attached to the surface of the membrane are washed off, so that the washing effect is realized; the spoiler guarantees that the device is not easily blocked by the pollutants and a washing period is greatly prolonged.