Constructing heterojunctions represents a prevalent approach for enhancing piezo-photocatalytic performance. However, it remains challenging due to contradictory charge polarity and a poor active site. In this study, we employed an in situ hydrothermal method to fabricate a ZnIn2S4-BiOCl compact heterojunction with interfacial chemical bonding. Experimental and theoretical calculations demonstrate that the interfacial chemical bond (Bi-S bond) creates a strong interfacial electronic effect between the heterojunctions, acting as strain centers and charge transfer channels to enhance coordinated piezoelectric and photoelectric fields, thereby facilitating charge transfer. Additionally, interfacial bonding induces dynamic surface reconstruction and redistribution of electron density, improving reactant activation and charge exchange while reducing reaction barriers. Consequently, ZB-4 catalyst exhibits exceptional piezoelectric photocatalytic performance for pure water to H2O2 conversion (1987.33 μmol g-1·h-1), which is 5.85 times than that of pure BiOCl. This study presents a valuable strategy for enhancing positive coordination between heterojunctions and the photocatalytic piezoelectric effect.