The reverse osmosis membrane is an artificial semipermeable membrane with certain characteristics made by simulating biological semipermeable membranes. It is the core component of reverse osmosis membrane technology. The membrane pore size of the reverse osmosis membrane is small, so it can effectively remove dissolved salts, colloids, microorganisms, organic matter, etc. in the water. The system has the advantages of good water quality, low energy consumption, no pollution, simple process and easy operation.