This machine is matched with metering device, which integrates bag, filling, filling, printing and counting. Can be modified according to the material of the opening and closing method metering device. But at this stage, China's packaging machinery exports are still less than 5% of the total output value, but the total output is quite similar to the developed countries. Air pressure is not correct, the cylinder swing rod loosening, heating temperature is low, hot-press roller and transmission roller is not parallel when the heat seal undesirable. The maintenance method is to adjust the parallelism, adjust the temperature and pressure to make it tight.