Extensible standard switch cabinet

The utility model discloses an extensible standard switch cabinet. The bus-bar box comprises a box body I and a bus-bar box, the busbar box is provided with a plurality of busbar holes which are communicated with the first box body and used for allowing busbars to pass through. A hinge rod is further arranged at the opposite connection position of the first box body and the busbar box, the hinge rod is vertically arranged and can be connected to the first box body and the busbar box in an up-down sliding mode, the hinge rod is connected to the movable baffle and the side baffle, and an elasticassembly used for driving the hinge rod to vertically slide is further arranged between the hinge rod and the first box body and between the hinge rod and the busbar box. The elastic assembly comprises a first folding arm and a second folding arm which are hinged to each other, the first folding arm is hinged to the hinge rod, the second folding arm is hinged to the first box body and the busbarbox, and an elastic device