A method for micro-motion parameter estimation of radar target based on high-order moment function is present-ed ,which is suitable for the narrowband radar .Firstly ,the radar echo is mixed with the reference signal ,and then its direct current is eliminated .The high-order moment function of the signal with different time delays is calculated firstly ,then the Fourier transform results of the high-order moment′s imaginary parts are calculated and the peak value of their product results is detected to obtain the rotation frequency of target′s micro-motional parts .The radius and the initial phase are estimated by successive cancellation .A com-puter simulation is given to illustrate the effectiveness of the proposed method .%提出了一种适用于窄带雷达信号的微动参数快速估计方法。该方法首先对目标回波信号进行混频处理，并去除直流分量后计算高阶矩函数，通过检测不同时延下高阶矩虚数部分傅里叶变换累积结果的峰值位置，可快速获得目标部件的旋转频率。然后结合串行消除的方法实现对旋转半径和初相的快速准确估计。最后，仿真验证了该方法的有效性。
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