Portable vacuumizing device

The invention discloses a portable vacuumizing device. The portable vacuumizing device is composed of a fixing frame (1), a composite molecular pump (2), a rotary vane pump (3) and a high-vacuum corrugated pipe (4). The portable vacuumizing device is characterized in that the composite molecular pump (2) is connected with a low-temperature heat insulation container through a pumping port I (6), and an exhaust port I (7) of the composite molecular pump (2) is connected with an air pumping port II (8) in the rotary vane pump (3) through the high-vacuum corrugated pipe (4); and the air in the low-temperature heat insulation container is sucked into the composite molecular pump (2) through the air pumping port I (6), then is discharged from the exhaust port I (7) of the composite molecular pump (2), enters the rotary vane pump (3), and finally is discharged from an exhaust port II (9) of the rotary vane pump (3). The vacuumizing device is an independent moving part and is more convenient and faster to maintain af