Polyolefin heat-shrinkable packaging bag

The utility model relates to the technical field of packaging bags, in particular to a polyolefin thermal shrinkage packaging bag which comprises a bag body, an opening supporting assembly is installed on the inner wall of the bag body, and the opening supporting assembly comprises two fixing rods fixedly connected to the inner walls of the two ends of the bag body; the multiple mounting blocks are fixedly connected to the outer walls of the two sides of the two fixing rods correspondingly; the plurality of blocking rods are rotationally connected to the plurality of mounting blocks respectively; and the two hinges are fixedly installed on the outer walls of the tops of the two blocking rods on one side respectively, the diagonal lines, away from each other, of the multiple installation blocks are all arranged to be round corners, and the outer walls of the tops of the two installation blocks at one end are fixedly connected with the same lifting rope. The two supporting rods and the blocking rod can be drive