Extensible space type power distribution cabinet

The utility model discloses a power distribution cabinet capable of expanding space. Relating to the technical field of electrician power, the problems that the internal space of the power distribution cabinet cannot be expanded and the sealed internal space is not easy to dissipate heat are solved; an extensible space type power distribution cabinet comprises an outer cabinet, a cabinet door, aninner cabinet, a sliding assembly and a heat dissipation device. The outer cabinet is hinged with a cabinet door through a hinge; the outer cabinet is connected with the inner cabinet through a sliding assembly. A heat dissipation device is mounted on the inner cabinet; pull U-shaped handle, the inner cabinet can be pulled out through the sliding assembly; the inner cabinet can be fixed by tightening the positioning bolts through a screwdriver; the rubber waterproof sealing interlayer can prevent rainwater and moisture from entering the cabinet body; when electronic components and circuits work, heat can be generated,