The cams on the lower and the upper dials of this machine is featured with closed tracks design with cams of knit, tuck and miss. The yarn feeding segment can be adjusted independently which can knit elastic double jersey fibre by installing an additional lycra apparatus, which is also equipped with different types of cylinders, easy to alter, which can meet the everlasting demand of the knitting market. This machine can produce various kind of high-quality double jersey fiber or different levels of thickness. The speed of this machine is very fast with simple structure. The mechanism is stable and convenient to operate and the range of fiber pattern is wide.