This utility model relates to the field of power distribution cabinets and discloses a multi-layer modular power distribution cabinet, including a base cabinet. An extension cabinet is slidably connected to the top of the base cabinet, and a top cabinet is slidably connected to the top of the extension cabinet. Splicing components are installed on the exterior of both the base cabinet and the extension cabinet. A dehumidification component is installed inside the base cabinet. Each splicing component includes a housing. Housings are fixedly installed on both sides of the base cabinet and both sides of the extension cabinet. A plug rod is slidably connected inside the housing. A sliding plate is fixedly connected to the exterior of the plug rod. A spring is fixedly connected to the front side of the sliding plate. A baffle is slidably connected inside the housing. A limiting plate is fixedly connected to the top of the housing. In this utility model, by pulling the plug rod, the sliding plate compresses the spring, causing the plug rod to retract into the housing. Simultaneously, the baffle falls into the housing, enabling rapid splicing of extension cabinets or top cabinets. This facilitates increasing the number of extension cabinets and allows for arbitrary increases in internal dimensions without being affected by other factors.
