The invention discloses a combined low-voltage cabinet of a transformer. The combined low-voltage cabinet is characterized by comprising a vertical baffle plate, a horizontal baffle plate, a front panel and a low-voltage cabinet, wherein a low-voltage conductive rod is fixedly connected to a side panel of the front panel and the vertical baffle plate of the transformer, the low-voltage conductiverod is vertically fixed on the side panel and is arranged on the side panel, a groove is formed in the vertical baffle plate and is used for fastening the horizontal baffle plate, and a fixed plate isfixedly connected with an inner side of the horizontal baffle plate. The combined low-voltage cabinet has the characteristics of good environmental-friendly effect, simple structure, practicability and high efficiency, and is easy to promote and convenient to manufacture, the application method is reasonable, the production is improved, the electrical influence generated on the low-voltage cabinet is reduced, and the space of the low-voltage cabinet is saved.