Provided is an electric constant-pressure cup moving device. An internal-threaded metal pneumatic joint of a body of the cup moving device extends to one end of the external of the shell of the body of the cup moving device and is connected with a connecting pipe assembly mechanism through one end of a tracheal hose C, the other end of the tracheal hose C is connected with one end of a negative pressure filter of the connecting pipe assembly mechanism, and the connecting pipe assembly mechanism is connected with one end of an external-threaded metal pneumatic joint C of an ox horn cup mechanism through the other end of a tracheal hose E. The device has the advantages of light weight, a comfortable hold feeling, no hand rubbing, no frangibility, beauty, durability, low noise, small volume,enough pressure, convenient carrying, time saving, labor saving and constant pressure, and the pressure can be freely adjusted according to the patients' bearing capacity; compared with an ordinary cup moving device, the electric constant-pressure cup moving device is convenient to use, and can conduct moving cup treatment on body joints, and when the device is used for persons with thin and smallbodies, the phenomenon of being likely to lose cups does not happen.