The new steam shrink tunnel, different and irregular round bottles, square bottle, flat bottle, etc, to adjust, easy maintenance, contraction of smooth, low-pressure steam ejection mode sub-air package distribution is uniform and seamless steel pipe design, spray Exports adjustable into three sections, each of the high and low, respectively, before and after the gas can be adjusted to achieve the most perfect state of contraction effect. The whole machine housing is made of stainless steel and heat preservation, not only save energy and meet national safety standards, the bottom of the stainless steel water tray concentrated cooling condensation. The whole machine is waterproof design, easy operation and maintenance.