Non-woven fabric bag making machine is designed to deliver powder (colloid or liquid) to the hopper above the packaging machine by the feeder in real time. The introduction speed is controlled by the photoelectric positioning device. The rolled sealing paper (or other packaging materials) is led to the lapel molding machine by the guide roller. After being bent, it is lapped by the longitudinal sealing device to form a cylinder. The materials are automatically measured and filled into the bag, The transverse sealer pulls the bag barrel downward intermittently while carrying out the heat sealing cutting, and finally forms a flat bag with three sides of overlapping longitudinal seams to seal a bag.