The steam chamber is made of three layers of stainless steel plates. It has a good thermal insulation effect and effectively ensures the use of steam. With double steam chamber, the pre-shrinking speed is faster and the effect is more stable. Built-in automatic tape adjustment and electric eye monitoring and distribution function. For pure cotton, woolen or pulpy cloth, the atomizing water humidifying device can be added to make the cloth have good pre-shrinking effect and feel good.