Reverse osmosis is a membrane separation technology that can be driven by pressure by means of the working force of a selective permeable (semi-permeable) membrane. When the pressure added to the system is greater than the osmotic pressure of the influent solution, water molecules continuously permeate after passing through the membrane, it flows into the central tube through the permeate flow channel, and then the impurities in the water, such as ions, organics, bacteria, viruses, etc., flow out at one end, are trapped at the inlet side of the membrane, and then flow out at the outlet end of the concentrated water to achieve separation and purification purpose. The reverse osmosis equipment is to pass the raw water through a fine filter, a quartz sand filter, a compressed activated carbon filter, etc., and then pressurize it through a pump, using a pore size of 1/10000 μm ,reverse osmosis membrane (RO membrane), which makes high-concentration water into low-concentration water, and at the same time isolates industrial pollutants, heavy metals, bacteria, viruses and other impurities mixed into the water, and produces pure water.