Cutting and welding machine for round bottom packaging. Composed of a unwinder with triangle with brake to canvas and mechanical shaft; balance compensator with traction roller; support for various devices according to the need of production, cutting and welding with round bottom head and lower sealing table with movement, chip extraction system, conveyor belt with cotton straps and fixed stacking table, PLC with HMI (touch screen colorful "), easy to use and great location, with storage of recipes," skip "system, among other important functions to facilitate the operation and operator interaction, can-open digital communication system between electronic components.