Modular device for electrical film cutting and soldering in wrapping machines of the type where a pallet is static and the spool is orbiting around the pallet holding a spool holder carriage using a cycle wherein the film is attached to the package, retaining the film in the first turns, wrapping, soldering the film against a contrast plate and cutting the film; wherein the device comprises: - An electric film-width reducer placed in the spool holder carriage characterised in that the device further comprises: • A mounting plate and attached to the mounting plate: • An automatically actuated clip to retain the film, • An electric soldering and attachment group comprising a pressure attachment element that keeps the film attached to the contrast plate, a soldering element, means for moving forward the soldering and attachment group from an initial position to a contact position with the contrast plate wherein that means for moving soldering and attachment group comprise rack guides attached to the mounting plate and an electric motor; • An electric contrast plate group comprising a contrast plate and electric means for interposing the contrast plate between the film and the package to be wrapped wherein that means comprise an electric motor, a three-point locking mechanism mechanism that supports the contrast plate; wherein three-point locking device is actuated by a spindle that turns under the action of an electric motor; • a cutting element • A controller that synchronises the action of each of the elements. - An electric film-width reducer placed in the spool holder carriage • A mounting plate and attached to the mounting plate: • An automatically actuated clip to retain the film, • An electric soldering and attachment group comprising a pressure attachment element that keeps the film attached to the contrast plate, a soldering element, means for moving forward the soldering and attachment group from an initial position to a contact position with the contrast plate wherein that means for moving soldering and attachment group comprise rack guides attached to the mounting plate and an electric motor; • An electric contrast plate group comprising a contrast plate and electric means for interposing the contrast plate between the film and the package to be wrapped wherein that means comprise an electric motor, a three-point locking mechanism mechanism that supports the contrast plate; wherein three-point locking device is actuated by a spindle that turns under the action of an electric motor; • a cutting element • A controller that synchronises the action of each of the elements. • An automatically actuated clip to retain the film, • An electric soldering and attachment group comprising a pressure attachment element that keeps the film attached to the contrast plate, a soldering element, means for moving forward the soldering and attachment group from an initial position to a contact position with the contrast plate wherein that means for moving soldering and attachment group comprise rack guides attached to the mounting plate and an electric motor; • An electric contrast plate group comprising a contrast plate and electric means for interposing the contrast plate between the film and the package to be wrapped wherein that means comprise an electric motor, a three-point locking mechanism mechanism that supports the contrast plate; wherein three-point locking device is actuated by a spindle that turns under the action of an electric motor; • a cutting element • A controller that synchronises the action of each of the elements.