The bag closing machine is a portable and heavy-duty sewing tool suitable for closing any pre-made open-mouth bags. This bag closer machine closes all types of bags available such as woven polypropylene or unwoven polypropylene, paper (single two-wall or multi-wall), net, and cotton bags filled with anything. This bag closing machine is wear-resistant, hence having lower repair costs. This machine is reliable even under the most adverse operating conditions.