In China,the existing liquefied natural gas（LNG）terminals in coastal areas mainly meet the loading and unloading requirements for imported LNG carriers,and rarely have the function of reverse loading and unloading of bunkering ships.In order to make intensive use of shoreline resources and reduce project investment,we transform the existing large LNG terminal to meet the berthing and bunkering operation of small bunkering ships,as a scientific and reasonable solution.Taking the transformation of a LNG terminal in Zhejiang Province to increase the bunkering function as an example,we study the center distance of the berthing pier,the applicability of the operation range of the loading and unloading arm joint,and the arrangement of the mooring line,compare the relevant process parameters of the hull with the calculated values of the code,and analyze and verify the adaptability of the unloading arm operation envelope to the hull and wharf structures under different working conditions.Then we use the OPTIMOOR mooring software to simulate the degree of freedom and mooring force of different tonnage ships under different working conditions and environmental conditions.Finally,we propose a solution which adds a berthing facility with a spacing of 32 m,adds a variable diameter pipe assembly,a shore guide cable,a number of cables and other facilities,and appropriately raises the wind and wave height berthing standard according to different wind directions.