This invention provides a high chemical resistance of forward osmosis membrane, which comprises of a backing layer, a hydrophilic support layer, and an active layer. Said hydrophilic support layer substantially consists of a plurality of nanostructures. Each said nanostructure substantially consists of a carbon nanotube and a hydrophilic thin film covering each of said corresponding carbon nanotubes. A first surface of said hydrophilic support layer contacts with a surface of said backing layer. Said active layer covers a second surface of the hydrophilic support layer which is opposite to said first surface of said hydrophilic support layer and contacts with the second surface of said hydrophilic support layer. |