The invention belongs to the field of ultraprecise vibration attenuation, and specifically discloses a three-degree-of-freedom electromagnetic vibration absorption energy harvester. The three-degree-of-freedom electromagnetic vibration absorption energy harvester includes a resonance device, a tension device and an energy harvesting device, wherein the resonance device includes a shell and resonance units and a first permanent magnet which are arranged inside the shell, the inner surface of the shell is provided with a conductive coil connected with the energy harvesting device, the two sets of resonance units are arranged at two sides of the first permanent magnet respectively, each set of resonance unit includes a second permanent magnet and two flexible connecting pieces, one ends of the two flexible connecting pieces are connected with the second permanent magnet, the other ends pass through the shell to be connected with the tension device, and the first permanent magnet is connected with the second permanent magnets in the two sets of resonance units through the second flexible connecting pieces. The three-degree-of-freedom electromagnetic vibration absorption energy harvester can realize vibration absorption energy harvesting of three degrees of freedom, and has the advantages of fast response to microvibration, high energy harvesting efficiency and adjustable inherent frequency.