The utility model belongs to the technical field of automobile accessories and provides an end improvement structure overcoming the defect of thermal expansion and cold contraction of a luggage rack. The end improvement structure comprises a luggage rack body. A transition matching body is arranged at the end of the luggage rack body. The luggage rack body and the transmission matching body are assembled to enable the end of the transition matching body to abut against the right end face of a metal plate to be flush with the right end face of the metal plate. The luggage rack body is arranged on the transition matching body and can slide along an upper plane of the transition matching body under the state of thermal expansion and cold contraction. The end improvement structure has the advantages of being simple in structure, and convenient to install and fix; the transition matching body replaces the end of the luggage body to abut against the right end face of the metal plate, and in this way, a luggage rack is provided with a moving adjusting space when being in the state of the thermal expansion and cold contraction; as in the adjusting process, the transition matching body slides on the upper plane of the transition matching body back and forth, the defect caused when the end of an existing whole luggage rack body abuts against the right end face of the metal plate is overcome, and the appearance attractiveness of the whole luggage rack is improved.