A vacuum pumping device for manufacturing a vacuum glazing, comprising: a circular tubular pumping operation unit; a cylindrical pump-out hole sealing operation unit; a control part; and a driving device, wherein, the pumping operation unit and the pump-out hole sealing operation unit share a same central axis, form a cylinder with the operation unit being outside and the pump-out hole sealing operation unit being inside, and is able to move relatively along the central axis, a pumping channel is formed in a tube wall of the pumping operation unit to be connected to an inner surface of the tube wall, and a heating unit is provided in a top portion inside the pump-out hole sealing operation unit, the control part, through the driving device, time-sequentially controls the pumping operation unit and the pump-out hole sealing operation unit to move relatively along the central axis, controls the pumping channel to perform a pre-pumping/pre-pressing operation and a vacuum pumping operation, and controls the heating unit to heat a sealing sheet to perform a pump-out hole sealing operations the vacuum pumping device characterized in that the pumping operation unit includes a pre-pumping/pre-pressing operation unit and a vacuum pumping operation unit, the pre-pumping/pre-pressing operation unit and the vacuum pumping operation unit have the same central axis Z as the pump-out hole sealing operation unit, and form a circular tube with the pre-pumping/pre-pressing operation unit being outside and the vacuum pumping operation unit being inside, and pumping channels (221, 222) for respectively performing the pre-pumping/pre-pressing and the vacuum pumping operation are formed in the respective tube walls of the pre-pumping/pre-pressing operation unit and the vacuum pumping operation unit. a circular tubular pumping operation unit; a cylindrical pump-out hole sealing operation unit; a control part; and a driving device, wherein, the pumping operation unit and the pump-out hole sealing operation unit share a same central axis, form a cylinder with the operation unit being outside and the pump-out hole sealing operation unit being inside, and is able to move relatively along the central axis, a pumping channel is formed in a tube wall of the pumping operation unit to be connected to an inner surface of the tube wall, and a heating unit is provided in a top portion inside the pump-out hole sealing operation unit, the control part, through the driving device, time-sequentially controls the pumping operation unit and the pump-out hole sealing operation unit to move relatively along the central axis, controls the pumping channel to perform a pre-pumping/pre-pressing operation and a vacuum pumping operation, and controls the heating unit to heat a sealing sheet to perform a pump-out hole sealing operations the vacuum pumping device characterized in that the pumping operation unit includes a pre-pumping/pre-pressing operation unit and a vacuum pumping operation unit, the pre-pumping/pre-pressing operation unit and the vacuum pumping operation unit have the same central axis Z as the pump-out hole sealing operation unit, and form a circular tube with the pre-pumping/pre-pressing operation unit being outside and the vacuum pumping operation unit being inside, and pumping channels (221, 222) for respectively performing the pre-pumping/pre-pressing and the vacuum pumping operation are formed in the respective tube walls of the pre-pumping/pre-pressing operation unit and the vacuum pumping operation unit.