The invention relates to obtaining a nanofiber membrane by coating a hollow braided rope with a nanofiber layer, to the usage of said tubular nanofiber membrane as a support layer membrane, and to the fabrication of forward osmosis membrane by coating the surface thereof with thin composite film. Particularly, a tubular nanofiber forward osmosis membrane used in water & waste water treatment and desalination processes with high water flux, low reverse salt flux, as well as a low tendency of fouling, and the manufacturing method thereof are disclosed herein.