The HNDQ series intelligent harmonic suppression and reactive power compensation integrated module highly integrates a thyristor composite switch circuit, a CPU digital processing circuit, a low-voltage power capacitor (△ type or Y type), and an operation status indication circuit for each functional module. This product features a top-and-bottom split module structure, allowing for quick assembly and disassembly, making maintenance extremely convenient. Using this module for cabinet assembly results in a large capacity per cabinet and low cost. It is suitable for both local and distributed compensation, as well as centralized compensation, and is particularly suitable for high harmonic environments.