Reverse osmosis membrane water purification device

The utility model provides a reverse osmosis membrane water purification device which comprises a plurality of first-stage reverse osmosis membrane shells, a plurality of second-stage reverse osmosis membrane shells and a plurality of third-stage reverse osmosis membrane shells, a plurality of supporting frames are arranged in the rectangular containing frame, the first-stage reverse osmosis membrane shells are arranged in multiple rows, and the first-stage reverse osmosis membrane shells in each row are arranged on a plurality of transverse supporting rods of the supporting frames respectively; the water inlet pipeline is connected to the water inlet sides of the plurality of first-stage reverse osmosis membrane shells and is used for inputting water to be treated; the first-stage fresh water pipeline is connected to the fresh water sides of the plurality of first-stage reverse osmosis membrane shells and is used for discharging purified fresh water; the first-stage concentrated water pipeline is connected t