The embodiment of the invention discloses a transformer substation relay protection screen cabinet. The cabinet solves the problems that in terms of existing transformer substation relay protection screen cabinets, relay protection devices are usually placed in protection cabinet bodies, the relay protection devices are usually taken out for maintenance during maintenance or maintenance tools areinserted into for maintenance, and when the relay protection devices may be inconvenient to be taken out or may be inconvenient to maintain due to volume, quality, shape and the like, accidents such as accidental collision, accidental setting and misconnection of the relay protection devices may be caused during the maintenance process. The transformer substation relay protection screen cabinet comprises a cabinet body, a placement layer, a sliding assembly and a linkage assembly; a first threaded rod is rotated to drive the rotation of a rotating rod in the linkage assembly, and drive a second helical gear in the linkage assembly to rotate so as to drive a second threaded rod in the linkage assembly to rotate, and the second threaded rod rotates to drive an L-shaped connecting rod connected with a nut and drive the sliding assembly to perform pulling type motion in a T-shaped groove in the side wall of a cabinet body.