The invention aims at providing an electromagnetic type two-degree-of-freedom semi-active vibration absorber which comprises a stator, rotors and magnet exciting coils, wherein the rotors comprise a first rotor and a second rotor; the stator is installed outside the first rotor, and the magnet exciting coils are respectively arranged inside and outside the stator; the second rotor is installed outside the stator; and end caps are installed on both ends of the first rotor, the stator and the second rotor, and the first rotor and the second rotor axially move in relative to the end caps. The number of vibration absorbers used for controlling a plurality of exciting force frequencies is greatly reduced, installation space and cost are saved, a control link is simplified, and the vibration absorber has broad application prospect.