A power distributor includes an upper cover with an inverted U-shaped cross-section, a plurality of output power sockets being located along a longitudinal direction of the upper cover. The power distributor also includes a lower cover with a U-shaped cross-section. The lower cover is engaged with the upper cover to form housing for the power distributor. The upper cover is composed of several modular cover units that are interconnected with each other. Each modular cover unit includes stepped connecting parts that connect to stepped connecting parts of adjacent modular cover units. The lower cover includes a slidable hanging mechanism. A front end of the housing is provided with an input power connector.