提出了一种新的莫尔条纹解调技术即频移法，它改变了莫尔条纹分布的频率，而相移莫尔法只是改变了莫尔条纹的相位。从阴影莫尔图分布的基本公式出发，借助于相移阴影莫尔法的思想推导并得出了频移阴影莫尔法的公式，在此基础上给出了特定条件下的实用公式。同时也分析了其相位图，将其主值范围从０～π拓展到０～２π，解决了其去包裹中正负号确定问题。最后给出了实验结果，并分析和模拟了由于频移的不准确给测量结果带来的影响。 A new Moiré fringe demodulation technique called frequency shift method is proposed, which changes the frequency of moiré fringes, while the phase shift Moiré method just changes the phase of moiré fringes. Based on the basic formula of shadow Moire distribution, the formula of frequency shift shadow Moire method is derived and deduced by the idea of ​​phase shift shadow Moire. Based on this, a practical formula under certain conditions is given. At the same time, the phase diagram is also analyzed, and its main value range is expanded from 0 ~ π to 0 ~ 2π, which solves the problem of determining the sign of undeveloped parcels. Finally, the experimental results are given, and the influence of the inaccuracy of the frequency shift on the measurement results is analyzed and simulated.