针对电法勘探中同步的重要性和现有同步方法存在的问题、不完全同步的实质、同步信号与待测信号不完全同步相干检测对多频组合波电法相干检测的傅里叶变换结果的影响 ,研究了共时钟完全同步相干检测方案及其原理、具体实现过程 .实验结果表明 :利用共时钟完全同步方案可以使待测信号与采样控制信号完全同步 ,达到准确采集数据的目的 ,得到待测信号的精确傅里叶变换结果 ;本同步方案不仅可在多频组合波电法仪器中获得成功应用 ,还可以推广到单频电法仪器中 ,得到更好的应用效果 In view of the importance of synchronization in electrical prospecting and existing problems of existing synchronization methods, the essence of incomplete synchronization, the incomplete synchronization of synchronization signal and signal under test, the coherent detection of Fourier transform results of coherent detection of multi-frequency combined wave method , The paper studied the scheme of co-clocked total synchronous coherent detection, its principle and its concrete realization process.The experimental results show that the co-clocked full synchronization scheme can synchronize the signal under test and the sampling control signal completely to achieve the purpose of accurate data acquisition, The accurate Fourier transform result of the signal to be measured. The synchronization scheme can not only be successfully applied in multi-frequency combined wave method instruments, but also can be extended to single-frequency electrical method instruments to obtain better application effects