In the case of diffierent and irregular round bottles,square bottles and flat bottles etc, the new-style steam shrinking oven is easy to adjust and maintain. It has an even shrinking. The distribution of low-pressure steam drum and spouting way of steam are uniform and designed with seamless tube. The nozzle is divided to be adjustable three segments and the height ,position and steam output of every segment can be adjusted respectively so as to gain the perfect shrinking.