Automatic unpacking and feeding method for granular materials

The invention discloses an automatic unpacking and feeding method for granular materials. A bag carrying machine is adopted for carrying material bags to a discharging mechanism; in the discharging mechanism, the material bags are supported by a bag supporting mechanism; the bottoms of the material bags are linearly cut by a cutting mechanism, and discharging begins; a folding and unfolding mechanism is used for repeatedly folding and unfolding the material bags after supporting claws are inserted into the material bags from cutting openings, and intermittent impacting is carried out on the bag walls of the material bags by pulse type high-pressure airflow when the material bags are tensioned, and residual materials are discharged; and a material collecting and conveying mechanism is used for collecting the discharged materials and conveying the discharged materials, so that automatic feeding is realized. Automatic unpacking, discharging and feeding are achieved in the method, and packaging bag chipping pollu