Multi-edge sealing square bottom bag film closing device and bag making machine

The invention discloses a multi-edge sealing square bottom bag film closing device and a bag making machine, and relates to the technical field of plastic packaging bag production equipment.The multi-edge sealing square bottom bag film closing device comprises a folding mechanism and an inflection mechanism, the folding mechanism and the inflection mechanism are arranged on a base, and the folding mechanism comprises a top face folding assembly and a bottom face folding assembly; the top face folding assembly is arranged on the front side of the bottom face folding assembly, the top face folding assembly is used for upwards folding a continuous bag body material on the top in the length direction of the continuous bag body material, the bottom face folding assembly is used for upwards folding a continuous bag body material on the bottom in the length direction of the continuous bag body material, and the inflection mechanism is arranged on the rear side of the folding mechanism. The folding device is used for