Marine offloading hose is an important equipment which has been installed between oil production and storage unit and shuttle tanker. Marine offloading hose has a complex structure and plays a key role in oil transportation, which makes it require high technology. For a long time, a few companies from developed countries have a monopoly on this industry. We introduce the long course of marine offloading hose localization and analyze the production technology of 20 inch double-carcass reeling floating main hose through the characterization of its structure and material with the international standard GMPHOM 2009 for marine offloading hose as a reference.