The utility model discloses an automatic deaerating and oil change device, which comprises a nitrogen cylinder, a high voltage transformer, an automatic deaerating and oil change device, a waste oil can and a new oil can, wherein the nitrogen cylinder, the high voltage transformer, the waste oil can and the new oil can are respectively connected with the automatic deaerating and oil change device. The utility model has the advantages of good integrity, strong specificity, flexible movement, quick putting into operation, safety and reliability.