The sanforizer is also called an Opre-shrinking machine. Equipment for mechanical pre-shrinking of fabrics. It means that under suitable wet and hot conditions, the fabric is expanded and contracted by the elastic blanket to increase the weft density and warp weaving to a certain extent, so as to have a slack structure. When the fiber is mixed and swelled, it no longer causes the warp. The length is shortened, and the effect of significantly reducing the shrinkage rate of the finished product is received.