Reverse osmosis membranes are artificial semipermeable membranes with specific characteristics, designed to mimic biological semipermeable membranes. They are the core component of reverse osmosis technology. The principle of reverse osmosis technology is to separate substances from water by applying pressure higher than the osmotic pressure of the solution, based on the fact that other substances cannot pass through the semipermeable membrane. Reverse osmosis membranes have very small pore sizes, thus effectively removing dissolved salts, colloids, microorganisms, and organic matter from water. The system offers advantages such as high water quality, low energy consumption, no pollution, simple process, and easy operation.