The utility model discloses a universal structural member of a spherical net rack, which comprises a conversion layer, the conversion layer comprises a main keel, an auxiliary keel, a conversion codemember, a cross conversion code member and a connecting steel corner connector, the main keel is fixedly connected with the cross conversion code member through the conversion code member, and the auxiliary keel is fixedly connected with the main keel through the connecting steel corner connector; in this way, the installation mode of the main keel of the transfer layer is effectively optimized, firmness is improved, meanwhile, the overall flatness is guaranteed, the installation efficiency of the large-area suspended ceiling of the airport is improved, and the common quality problem of a traditional large-area suspended ceiling of the airport is more effectively avoided.