The invention relates to the technical field of natural gas storage tanks, in particular to a low-temperature ultra-large liquefied natural gas storage tank. The low-temperature ultra-large liquefiednatural gas storage tank comprises a protective tank, a four storage structures, a rotary feeding structure, an intelligent control structure and a folding sun-shading structure, the storage structurecomprises connecting rods, mounting rings, four storage tanks, discharging hoses, valves and springs, the four storage tanks are distributed in a cross shape, the storage tanks are horizontally arranged on the inner side wall of the protective tank, and the outer side walls of the storage tanks are sleeved with a plurality of evenly-arranged mounting rings. Natural gas can be normally conveyed into the designated storage tank, traditional unified adding is not adopted, the proper amount of the natural gas can be sequentially added into the storage tanks, the situation that due to unified adding, the internal pressure of a single storage tank is increased easily, danger is generated, safety is guaranteed, a Z-shaped feeding pipe is replaced to be aligned with a feeding pipe needing to be corresponding, the manual adjusting process is not needed, time and labor are saved in the operation process, and the working efficiency is improved.