Abstract: A new type of equipments for vibratiion fatigue testing, which is based on electro-magnetic eddy current technique, is developed. It has advantages of wide frequency band, and good performance of high frequency. In this system a capacitor is used to generate series resonance, therefore the power consumption is greatly decreased. A new method of vibration exciting is developed in the technical area of structural fatigue tests.The principle, performance and characteristics of the electro-magnetic eddy current exciting are illustrated in this paper. Analysis of the magnetic circuit, design of the structure, scheme of the series resonance, automatic control of the amplitude and remote monitoring are described. Finally, the fatigue testing of engine blades is introduced by this system, and ii is shown that the results of the experiments are satisfactory.