The invention relates to a main-sub pot-type combined container for liquid nitrogen. The container comprises sub pots, a pipeline system, an interlayer, a main pot, a measurement and control system, safety accessories and an external operation platform; the combined container for the liquid nitrogen is coated with paint and mounted on a basic platform; five sub pots are distributed concentrically to form an equilateral polygon; the pipeline system is arranged in a center area from five sub pots to the main pot; each sub pot adopts the structure of a vertical cylinder; the bottoms of the sub pots are supported by support legs; a filling opening, an air outlet, an external pressurization opening and an upper shifting filling opening are formed in each pot. The combined container can be used for implementing the processes of shifting filling, pressurization, pressure release, and real-time monitoring and control, and is ideal large-sized liquid nitrogen storage and supply equipment. The container is used for storage and supply of the liquid nitrogen, liquid is discharged out through a pressure extrusion method, the operation is simple, the reliability is high, discharge loss during the storage period is reduced through storage under pressure, compared with a spherical tank, the main-sub pot-type combined container is easier to manufacture and mount, and the manufacturing and mounting costs are low, therefore, the container has relatively high security, stability and controllability.