LQ series heat-sealing and cold-cutting bag-making machine is composed of light, machine, electricity and frequency conversion. It is a new generation of computer-controlled heat-sealing and cold-cutting bag-making machine developed by adopting the principle of foreign advanced bag-making machine technology. This machine is equipped with photoelectric eye tracking, the main motor is frequency-converted and speed-regulated, and the operation is stable and the bag-making precision is high.