The improved model cylinder knitting preshrinking machine /tubular compactor machine , is a kind of type cylinder tubular compactor used for cotton knitted fabric to finalize the design equipment, use the cloth fabric into the expansion, super feeding wheel, wet the box, the feeding of wet steam fabric into a pair of warm felt roll make reservation form fabric, fabric after the reservation form again over feeding two sets of drying cylinder and carpet, make the final setting of the knitted fabric, knitted fabric by transmission after setting blanket to the mercy of a pipe or cloth roller cloth, the improved model can effectively improve preshrinking effect, improve the quality of cotton fabric finishing treatment