Transformer substation cable trench through-wall plugging plate

The utility model provides a through-wall plugging plate for a cable trench of a transformer substation. The fireproof plate comprises a front fireproof plate body, a rear fireproof plate body and a plurality of hollow pipes, all the hollow pipes penetrate through the front fireproof plate body and the rear fireproof plate body in parallel, the two ends of each hollow pipe are fixed to the front fireproof plate body and the rear fireproof plate body respectively, the hollow pipes are filled with fireproof mud, and plugging covers are arranged at pipe openings in the two ends of each hollow pipe respectively. When in use, the device provided by the utility model is used;, the through-wall plugging plate is arranged on the wall body in advance, when the cable passes through the wall, only the plugging cover of the hollow pipe needs to be dismounted and the fireproof mud needs to be taken out, the cable can pass through the wall, the fireproof mud is taken out to plug and seal the gap tocomplete cable through-wa