Efficient tank body structure of low-temperature liquid tank car

The utility model discloses an efficient tank body structure of a low-temperature liquid tank car, which comprises tank bodies and a support for fixing the tank bodies, the number of the tank bodies is two, each tank body comprises an inner container and a shell, the inner container is arranged in the shell, a gap is arranged between the inner container and the shell, and the interior of the gap is in a vacuum state. The inner container, the outer shell and the cold shield assembly which are made of stainless steel materials can effectively improve the corrosion resistance of the structure, the inner container is arranged in the outer shell and used for containing low-temperature liquid, a heat insulation interlayer is formed in a gap in a vacuum state, and therefore the heat insulation performance of the structure is improved. The heat insulation performance of the low-temperature liquid tank car or tank box is ensured; the two tank bodies are used for loading and unloading low-temperature liquid through the