对用稀土Ｃｅ 改性的高阻尼ＭｎＣｕ 合金的阻尼性能与微观组织进行了研究。结果表明，添加稀土元素Ｃｅ，不仅能显著提高ＭｎＣｕ 合金的阻尼性能，而且能缩短达到峰值阻尼性能的时效时间，同时还抑制了过时效时阻尼性能的下降。 The damping properties and microstructure of high damping MnCu alloy modified with rare earth Ce were studied. The results show that the addition of rare earth element Ce can not only significantly improve the damping capacity of MnCu alloy, but also shorten the aging time of peak damping performance and suppress the decline of damping performance.