The paper researches the side wear of the curve rail at No. 1 Line of Shanghai Subway, illustrates the contact fatigue crack of rail steel and the transfinite process of the curve side wear, and points out the department of the works center will adopts some measures to reduce the transfinite at the curve side wear, so as to recognize and master the development of the curve side wear, and have the advanced prevention.%主要针对上海地铁一号线曲线钢轨侧磨进行研究，阐述了钢轨接触疲劳裂纹的产生及曲线侧磨超限过程，提出工务部门为减缓曲线侧磨超限采取的措施，从而正确认识和掌握曲线侧磨的发展规律，主动进行超前防范。
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