While commissioning a temporary jetty of a regasification terminal, a LNG ship was used as the LNG supply source, berthing at the temporary jetty to supply liquefied LNG to the onshore gasification station which provides gas phase natural gas for power generation. The small pressurised LNG ship has FSU cargo tank at 0.28 MPa, with a capacity of 28 000 m3. The FSU and MFP(Mobile FIling Platform) are connected by hoses. This LNG supply system is characterized by fast temperature rise, difficulties in pressure control and flow control at different stages during commissioning process. At the same time, due to the existence of the hose, it becomes one of the key constraints in the commissioning process, as it becomes necessary to break through the heating zone of the hose under pressure. Therefore, the procedure of intermittent pre-cooling under pressure is adopted for commissioning. Based on cold energy calculation, the commissioning were divided into four stages, namely BOG pre-cooling, LNG pre-cooling, LNG filling and LNG transportation. Different techniques for temperature, pressure and flow control are used in different stages to meet the requirements of process commissioning in different stages. The rate of temperature drop and the temperature difference between the upper and lower part of the pipeline during the whole commissioning process meet the specification requirements and a successful commissioning is achieved in one attempt. The measures introduced here provide technical references for nearshore LNG projects commissioning with hose technology and reliable technical experience for unloading small LNG ship under pressure, which provides a valuable reference for the development of inland LNG technology.