DOW membrane reverse osmosis water treatment adopts stainless steel multi-medium filter, active carbon filter effectively to remove big impure particles and suspending matters, improve RO film water inputting index, effectively remove the smell and rest chlorine of the original water, and improve the taste of water quality. The main machine adopts American high effective low-pressure compound film, with single film salt removing degree up to 99%. The high low-pressure protection imported from Korea ensures the breakdown low to 0%, with the outputting water up to national pure water standard.