Expandable combined cabinet

The utility model discloses an expandable combined cabinet which comprises a bottom plate and a top plate, the top of the bottom plate is fixedly connected with two side plates, the outer walls of one sides of the two side plates are fixedly connected with the same back plate, the inner walls of the opposite sides of the two side plates are fixedly connected with limiting groove plates, and the limiting groove plates are fixedly connected with the top plate. And the inner walls of the two limiting groove plates are slidably connected with the same placement cabinet, the outer walls of the two sides of the placement cabinet are both fixedly connected with connecting blocks, the two connecting blocks make contact with the inner walls of the two limiting groove plates correspondingly, and the inner walls of the two limiting groove plates are both fixedly connected with limiting rods. When the cupboard is used and articles are placed in a deeper place, the articles are convenient to take, the head of the articles