The utility model relates to tubular equipment, in particular to a structure capable of improving a shell side fluid energy exchange effect of tubular equipment. The structure comprises an annular jacket, a shell, a baffle plate arranged in the shell, a fixing plate, and tubes fixed by the fixing plate, and is characterized in that the annular jacket is arranged outside the shell; an annular channel is arranged between the annular jacket and the shell; a fluid inlet/outlet is arranged on the annular jacket; a plurality of holes are arranged on the shell; and the annular channel is communicated with the space in the shell through the holes. By the structure, the technical problems that a dead angle exists in the flowing of the far-end fluid in the shell side, the heat exchange effect is reduced in the dead angle area so as to cause local overheating or insufficient heating, and the equipment has abnormal stress due to excessive temperature difference so as to bring danger to safety operation of the equipment in the process of using the existing tubular equipment are mainly solved. Through the structure, the dead angle can be eliminated, the heat exchange effect is improved, and the problems of local overheating or insufficient heating, and possible abnormal stress of the equipment are avoided.