Analysis method of spring fatigue life

The embodiment of the invention discloses an analysis method of a spring fatigue life. The analysis method comprises the steps that a stress-cumulative action number curve is established; a stress-life curve of a to-be-tested spring material is obtained; stand stress data corresponding to all cumulative action numbers are obtained according to the stress-life curve; the stress corresponding relationship between standard stress data and tested stress data is established; limit stress corresponding to the limit life of the to-be-tested spring material is obtained on the stress-life curve; basedon the stress corresponding relationship, limit testing stress corresponding to the limit stress is obtained; and based on the limit testing stress and the stress-cumulative action number curve, the limit testing life is predicted and serves as the fatigue life of a to-be-tested spring. According to the technical scheme, the fatigue life of a spring piece in the actual using environment can be truly reflected, thus engine