基于DFT算法对采样波形开展傅里叶分析，得到各次谐波的含量及角度。算法采用VBA编程，波形数据和分析结果直接显示在excel表格中，操作简便、直观。例程以直流偶次波形为参考波形开展傅里叶分析，可在源波形列输入其他任意波形进行分析。-To carry out sampling waveform Fourier analysis based on DFT algorithm, to obtain the content and angle of each harmonic. Algorithm using VBA programming, waveform data and analysis results displayed directly in Excel form, simple operation, intuitive. This program uses DC even waveform as a sample waveform, it can be changed to any input other arbitrary waveform in the source waveform column.