The utility model relates to the technical field of anti-seismic supports, in particular to a profile steel mounting structure for an anti-seismic support, which specifically comprises a profile steel body, a connecting base and a bolt
assembly, the profile steel body comprises a first web and a first
flange, a plurality of first pentagram holes are formed in the first
flange along the length direction, and the bolt
assembly comprises bolts and nuts. The bolt comprises a screw part and a pentagram part, the connecting base comprises a U-shaped connecting piece, a pentagram combination hole is formed in the U-shaped connecting piece, and at least two clamping structures capable of being in sliding clamping fit with the pentagram part are formed in the pentagram combination hole. In the installation process, according to the actual
installation error, the pentagram part of the bolt can select the clamping structure at the proper position in the pentagram combination hole to be in sliding clamping connection with the first pentagram hole, fine adjustment of the profile steel installation position is achieved, the connection problem caused by the
installation error is effectively solved, additional drilling is not needed, the construction cost is reduced, the construction time is shortened, and the construction efficiency is improved. And meanwhile, the structural strength of the profile steel is not influenced.