Reverse osmosis device with countercurrent flushing

The utility model provides a reverse osmosis device with a countercurrent flushing function. The novel reverse osmosis device comprises three original program control valves, namely a water inlet valve, a production and discharge valve and a concentrated discharge valve in a conventional reverse osmosis device, as well as automatic flushing valves (including a first-section backwashing valve, a first-section backwashing discharge valve, a first-section backwashing isolation valve, a second-section backwashing valve, a second-section backwashing discharge valve and a second-section backwashingisolation valve) for sectional backwashing. The valves are mutually switched and matched with the reverse osmosis flushing pump in the shutdown flushing process of the reverse osmosis device; concentrated water with high salt content on the concentrated water side of the reverse osmosis membrane can be flushed away, pollutants intercepted on the end face of the membrane and in a membrane water inlet flow channel can be fl