Ferric oxychloride (FeOCl), an iron-based catalyst with a unique coordination structure, has demonstrated effective pollutant removal capabilities in various reaction systems such as photo-Fenton, Fenton-like, and electro-Fenton processes. However, in previous studies, little or no attention has been paid by researchers to the piezoelectric properties of FeOCl and the pollutant removal performance exhibited in the presence of piezoelectric fields. In this study, we observed that the piezoelectric effect significantly enhanced the Fenton-like reaction process of FeOCl. Whereas the piezoelectric properties of FeOCl have not been reported in the previous research. The process significantly enhances the kinetic removal rate of pollutant, which is 3.12 times higher than the Fenton process and 18 times higher than the Fenton-like process for FeOCl. Furthermore, we observed a significant increase in the kinetic removal rate of pollutant after lattice distortion of FeOCl under the piezoelectric field and revealed how this process mediates the ultrafast oxidative removal process. Notably, we also detect the formation of pollutant polymeric products during the piezoelectric enhancement process, confirming the existence of a pollutant polymerization pathway during piezoelectric catalysis. The piezoelectric-enhanced FeOCl Fenton-like process constructed in this study not only provides important theoretical support for the practical application of FeOCl but also opens new research perspectives for the application of FeOCl in the field of piezoelectric catalysis.