Abstract: FLNG cryogenic hose unloading system technology is mainly mastered by a few countries such as Europe and America. Cryogenic hose material selection and structure design are difficult, manufacturing and performance testing work cryogenic sealing, connection and leakage monitoring are also difficult, cryogenic hose system structure is complex, and the system safety requirements are high. Key technologies of cryogenic hose include cryogenic resistance, high isolation and compliance structure multi-objective collaborative design technology, large diameter multi-layer composite hose continuous winding molding technology and cryogenic condition dynamic fatigue test verification technology, large size hose manufacturing equipment needs to be developed, while full-size testing equipment needs to be systematically studied. FLNG cryogenic hose unloading system is irreplaceable for the development of South China Sea gas fields, and has a good application prospect in the aspects of floating ship to shore transportation and ship refueling.