Abstract: This paper is mainly about the study on the processing and mechanical performance of glass-fiber composite springs. The processing parameters of cylindroid spiral springs were confirmed on the basis of a large number of experiments. Influence of processing technology and structure parameters of the composite spring on bending resilience, bending restoration rate and tensile property was also tested and analysed.The experimental results indicate that bending mechanical performance of the composite spring is directly associated with the inside diameter of the spring, and the diameter, twist and number of fiber bundles. The bending restoration rate of the composite spring is under the influence of bending time and restoration time. The processing and structure parameters can be regulated according to specific conditions.