This machine is a carding machine coupling means coupled between the Qing Hua, upper and lower cotton box structure, in order to prevent the roller around the flower phenomenon, two pairs of upper and lower hopper feed roller diameter than conventional much larger, because around the flower and put an end to cotton tank airflow generated instability phenomenon, this machine uses self-loop form, the transformation of the old machine to minimize unnecessary pressure on the dust, fully enclosed structure is one of hopper to choose the most cost-effective on the market the most suitable.