Vacuum insulation device and liquefied natural gas vehicle gassing system

The utility model discloses a vacuum insulation device and a liquefied natural gas vehicle gassing system comprising the same, relating to liquefied natural gas conveying equipment. The liquefied natural gas vehicle gassing system comprises the vacuum insulation device and a liquefied natural gas immersed pump, wherein the vacuum insulation device comprises an inner container, a casing, a liquid inlet pipe, a liquid outlet pipe and a return pipe, the inner container is connected with the casing through a flange and a flange cover, the liquid outlet of the liquefied natural gas immersed pump is away from the upper end face of the flange by 200-300 mm, and the liquid outlet pipe is connected with the liquid outlet hole of the liquefied natural gas immersed pump after passing through the flange. Because the liquid outlet of the liquefied natural gas immersed pump is away from the upper end face of the flange by a spacing distance, the heat-conducting path is extended, the heat transfer of liquefied natural gas in the device to the flange cover is reduced, the surface of the flange is enabled to be in a normal temperature state, and the surface of the flange cover can not freeze and frost.