The invention discloses a modular rectification cabinet. The modular rectification cabinet comprises a cabinet body, a module, a coordination control device, AC and DC convergence bars, a module external component and accessories, wherein the module is connected with the cabinet body by a drawer sliding rail assembly, the AC and DC convergence bars are arranged at a left side and a right side of the cabinet body, the coordination control device is arranged on a side surface of the cabinet body, the modular external component is arranged on a component installation plate in front of a part below the cabinet body, and the accessories are all arranged on an accessory installation plate behind of the part below the cabinet body. In the modular rectification cabinet, the application and runningof the rectification cabinet can be more reliable on the basis that electrical property such as an output power is ensured by reasonable structure arrangement, the rectification cabinet is more convenient to maintain, the practicability of the rectification cabinet is improved, and market promotion is facilitated.