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With the rapid development of modern industry, the demand for pipeline products in chemical, energy and Metallurgical Industries is increasing, and the demand for pipeline products in some special environments is also increasing, many pipeline products have also been developed for specific applications. "Vacuum adiabatic cryogenic tube" is one of the applications in a specific environment of the pipeline products. Vacuum adiabatic cryogenic tube, also known as high vacuum multi-layer adiabatic cryogenic tube, short for (liquid nitrogen vacuum tube) vacuum tube, it is a kind of cold preservation tube, the utility model is composed of an inner pipe, an outer pipe, an adsorbent, a corrugated expansion joint, multi-layer heat insulating materials, supports, etc. . Heat preservation principle: multi-layer heat insulation material is used in the interlayer to reduce radiation heat transfer; (liquid nitrogen vacuum tube) the interlayer is pumped into high vacuum state to reduce convection heat transfer; The inner and outer tubes are separated by supporting materials with low thermal conductivity to reduce solid heat transfer and achieve high vacuum multi-layer insulation effect. Through the high vacuum multi-layer adiabatic form of the inner tube to control the loss of cold to a low limit, greatly reduce the inner tube transmission medium loss to meet the delivery of low-temperature liquid. Therefore, the vacuum tube is a kind of low-temperature liquid transportation pipeline for liquid oxygen, liquid nitrogen, liquid argon, LNG and so on.