Novel installing device for power distribution cabinet

The invention discloses a novel installing device for a power distribution cabinet. The novel installing device comprises an installing plate. Two support pieces are symmetrically arranged on the surface of the installing plate left and right, limiting sinking grooves are formed between the two support pieces and formed in the surface of the installing plate, the five or above limiting sinking grooves are sequentially arranged from top to bottom, each support piece is provided with a guide pillar groove, a support plate is matched between the two support pieces, a limiting plate groove is formed in the support plate, a limiting plate capable of sliding left and right is arranged in the limiting plate groove in a matched mode, a pushing-pulling rod is fixedly arranged at the top of the left edge of the limiting plate and used for pushing the limiting plate to slide left and right in the limiting plate groove, and the right side of the limiting plate is used for sliding rightwards and being matched with the lim