Abstract: Aiming at the inconvenience problem of fatigue life evaluation of the solder joint of electromagnetic wire in traction moter stator, a kind of simple equipment for strain fatigue measurement was designed to instead the manual bending approach at the working site.Using the designed equipment, the amplitude of plastic deformation (i.e.angular distortion)can be preset according to testing requirement, and the deformation controlled by mechanical limitation per time can be consistent, therefore, the consistency and comparability of the tesing results are guaranteed.The practical examination for the resistance brazing joint of a certain type traction motor had been carried out by using the equipment, the results show that it is simple, economical and convenient by using the designed equipment.