Cutting and welding machine for the production of t-shirt bags with high productivity and confidence. Composed by an unwinder with tension control and edge alignment and slit-sealer; accordion with versatility in the changes of production; balance compensator with print point regulators and film deflectors; cutting and welding with side-border welding head with nickel-chromium tape and heated knife, providing very low maintenance; output table with adjustable length; robot for the handle of the package with hydraulic press for the cut of the handle and table of automatic accumulation; PLC with HMI (color touch screen) of easy handling and great location; with revenue storage and other important functions to facilitate the operation of the operator and interaction; "can-open" digital communication system between electronic components.