The invention relates to the technical field of automobiles, in particular to a heating/cooling tunnel structure and a mounting method thereof. The maintenance side of the heating/cooling tunnel structure comprises multiple maintenance door structures and multiple tunnel body insulation boards, wherein the maintenance door structures and the tunnel body insulation boards are alternately arranged; a dynamic air supply pipe body is fixedly arranged on the inner side of each movable door sheet, a dynamic air supply pipe transition segment is fixedly arranged on the inner side of each tunnel body insulation board so that one dynamic air supply pipe body can be taken out when any movable door sheet is opened, and therefore maintenance personnel can conveniently enter a tunnel body to maintain equipment; and after the movable door sheets are closed, each dynamic air supply pipe body and the corresponding dynamic air supply pipe transition segment are connected into a complete dynamic air supply pipe so as to complete normal conveying of hot air or cold air.