The invention discloses a protective mounting bracket suitable for mounting and transporting a transformer. The bracket comprises a base and mounting holes formed in four corners of the base, verticalplates are fixedly connected to the two sides of the top of the base correspondingly, a buffer frame is slidably connected to the position, located between the two vertical plates, of the top of thebase, cross rods penetrating through the vertical plates are fixedly connected to the left end and the right end of the buffer frame correspondingly, and the positions, located between the vertical plates and the buffer frame, of the outer portions of the cross rods are sleeved with extrusion springs. In the present invention, firstly, a graded buffer protection structure is adopted, and impact loads borne by the transformer in the installation or transportation process can be buffered and maintained in a graded mode, so that the impact damage phenomenon of the transformer is reduced, the protection performance of the mounting bracket is improved, secondly, a comprehensive mounting and dismounting structure is adopted, quick mounting and dismounting treatment between the transformer and the mounting bracket can be realized, the daily mounting, dismounting and overhauling convenience of the transformer is improved, and meanwhile, the structural stability of the combined and mounted transformer is also improved.