KING-PLUS multi-layer FFS heavy-duty sack blown film machine could provide users the possibility of more flexible material adjustment and then to improve the construction of production cost. We suggested it is better to use with KING-COOL automatic air ring system and internal bubble cooling system (IBC) that are developed by KING-PLUS and to connect with the thickness profile measuring control system, to adjust 30-48 points of throttles that control the volume of cooling air and then to improve the quality of thickness. The thickness tolerance will be within 4% ,and extremity tolerance will be within 6%. This production line could be connect with printer and inner embossing device to achieve one-stop production line - form, print and embossing, to enhance overall production efficiency. It could save the space of users plant, could save the time that staff need to carry the film roll to printing and could reduce the waste that happened in roll changing.