The utility model relates to the field of fitness equipment, in particular to a height adjusting support frame for fitness equipment, which comprises a support frame, a signboard and a protective cover. The supporting frame comprises a plate body, a connecting part, a supporting part and an identification part, the connecting part is arranged on one side of the plate body and used for being connected with the main body support, the supporting part is fixedly arranged on the other side of the plate body, the supporting part is located below the plate body and used for bearing a barbell stand, and the identification part is arranged on the side, provided with the supporting part, of the plate body and located above the supporting part; the signboard is mounted on the identification part; the protective cover comprises a shell and a connecting piece, the protective cover is transparent, the signboard is covered with the shell, and the connecting piece is fixedly arranged on the shell and used for being connected with the identification part. The signboard is arranged on the supporting frame, so that the height of the signboard can be adjusted along with the supporting frame, the height adjustment of the supporting frame cannot be affected, and the position of the signboard can be found more easily.