Packaging bag filling mechanism

The utility model discloses a packing bag filling mechanism, which relates to the technical field of filling mechanisms, and particularly comprises a base, a support table is arranged above the base, a plurality of support columns are symmetrically mounted at the bottom of the support table, the bottom ends of the support columns are connected with the base, a storage tank is fixedly mounted on the support table, a discharge port is arranged at the bottom of the storage tank, and the discharge port is connected with the support table. A first annular seat is fixedly connected to the outer side of the bottom end of the discharging opening, a second annular seat is arranged below the first annular seat, a second conveying pump is fixedly installed on the second annular seat, a feeding opening of the second conveying pump is connected with a telescopic hose, and the top end of the telescopic hose is connected with the discharging opening; and a material injection pipe is connected to a material outlet of the sec