The invention discloses a labyrinth support pipe type vehicle-mounted low-temperature heat insulation gas cylinder, and belongs to the field of movable low-temperature heat insulation pressure containers. The vehicle-mounted low-temperature heat insulation gas cylinder is mainly structurally characterized in that the vehicle-mounted low-temperature heat insulation gas cylinder comprises a front support structure and a rear support structure. On the premise that a gas cylinder structure is not changed, an inner pipe and an outer pipe of each of a front support and a rear support are designed into an inner-outer staggered labyrinth type circular pipe structure, wherein through the structure, the support structure strength can be guaranteed, meanwhile, the heat conduction path is effectivelylengthened, and compared with traditional circular pipes, the heat leakage amount can be greatly reduced. To eliminate heat stress caused by heat expansion and cold shrinkage, the front-end fixing andrear-end sliding form is adopted in the front support structure and the rear support structure. A front end support is fixed so that effective connection between the gas cylinder and an outer side inlet and outlet connecting pipe can be convenient; and a support pipe sliding structure is adopted at the rear end, and the problems that a rear support cylinder of a conventional gas cylinder is smallin diameter, and radial swinging is great are solved. The labyrinth support pipe type vehicle-mounted low-temperature heat insulation gas cylinder has the advantages that few welding points exist, the structure is simple, and strength is easy to guarantee. The structure can be used for storing and containing other similar low-temperature liquefied gas.