反渗透膜是一种模拟生物半透膜制成的具有一定特性的人工半透膜，是反渗透技术的核心构件。反渗透技术原理是在高于溶液渗透压的作用下，依据其他物质不能透过半透膜 而将这些物质和水分离开来。反渗透膜的膜孔径非常小，因此能够有效地去除水中的溶解盐类、胶体、微生物、有机物等。系统具有水质好、耗能低、无污染、工艺简单、操作简便等优点

Reverse osmosis membrane is a kind of artificial semi-permeable membrane with certain characteristics, which is the core component of reverse osmosis technology. The principle of reverse osmosis technology is that under the action of higher osmotic pressure than the solution, these substances and water are removed from the semi-permeable membrane according to other substances. The membrane aperture of reverse osmosis membrane is very small, so it can effectively remove dissolved salts, colloids, microorganisms, organic matter and so on. The system has the advantages of good water quality, low energy consumption, no pollution, simple process and easy operation