Seawater desalination is the process of using the selective permeability of reverse osmosis membrane to pressurize seawater through high-pressure pumps, so that the water molecule solvent in seawater can pass through and the salt plasma substances are intercepted, thereby producing fresh water. The pore size of Wende reverse osmosis membrane used in seawater desalination equipment is very small, which can effectively remove dissolved salts, colloids, microorganisms, organic matter, etc. in seawater. It has good water quality, low energy consumption, no pollution, simple process, Easy operation and other advantages.