A kind of forward and reverse flushing piston type water storage, micro-wastewater RO system and membrane flushing method

The invention discloses a positive and reverse flushing piston type water storage device, a micro waste water RO (reverse osmosis) system and a membrane flushing method. The positive and reverse flushing piston type water storage device comprises a water storage device main body, a water storage device case, a water storage device joint and a flushing water path. The system comprises a micro computer control system, a front filtering unit, an RO pump, an RO membrane device, a positive and reverse piston type water storage device, a pressure barrel, a back filtering unit and a water outlet faucet; the flushing water path comprises a positive flushing water path and a reverse flushing water path; through the positive and reverse flushing, dirty materials on the surface of the membrane are brought away, and the membrane hole blockage can also be prevented; the water-saving effect is improved; the service life of the RO film is prolonged.