Transportation fixing method and system for fuel assembly transportation container

The invention discloses a transportation fixing method and system for a fuel assembly transportation container. The transportation fixing method comprises the steps that S1, two positioning structural parts (30) are arranged in parallel at intervals and fixed in a bottom plate of a transportation box (10); a positioning clamping groove (31) is formed in at least one side edge of each positioning structural part (30); s2, at most two layers of fuel assembly transportation containers (20) are stacked on the positioning structural parts (30), and ground contact feet (21) at the two ends of the bottom of the fuel assembly transportation containers (20) located on the lower layer are clamped into positioning clamping grooves (31) of the two positioning structural parts (30) correspondingly; the pin grooves in the ground contact feet (21) at the two ends of the bottom of the fuel assembly transportation containers (20) located on the upper layer are matched with the positioning pins (22) at the two ends of the top