A tethered-wing traction system having: - a traction wing designed to generate a traction force under the effect of the wind, this traction wing having a leading edge and a trailing edge ; - a base platform to which the traction wing is connected via a traction line , the traction wing being designed to be deployed and folded in relation to this base platform ; - a mooring mast for the traction wing , disposed on the base platform ; - multiple folding lines each having an end fixed to the leading edge of the traction wing , the ends being spaced apart from one another along this leading edge ; - a furling line connected to the trailing edge of the traction wing ; this tethered-wing traction system being characterized in that it has: - a mooring carriage designed to slide along the mooring mast and controlled by a slide actuator , this mooring carriage having an engagement interface designed to keep the leading edge of the traction wing moored; - a folding carriage designed to slide along the mooring mast and controlled by a slide actuator , this folding carriage having capturing means designed to capture at least one folding line ; - a furling carriage designed to slide along the mooring mast and controlled by a slide actuator , this furling carriage having capturing means designed to capture the furling line ; - a control module for controlling said slide actuators , this control module having at least the following two modes of operation: a folding mode in which the mooring carriage and the folding carriage are moved away from one another; a furling mode in which the furling carriage and the mooring carriage are moved away from one another. - a traction wing designed to generate a traction force under the effect of the wind, this traction wing having a leading edge and a trailing edge ; - a base platform to which the traction wing is connected via a traction line , the traction wing being designed to be deployed and folded in relation to this base platform ; - a mooring mast for the traction wing , disposed on the base platform ; - multiple folding lines each having an end fixed to the leading edge of the traction wing , the ends being spaced apart from one another along this leading edge ; - a furling line connected to the trailing edge of the traction wing ; - a mooring carriage designed to slide along the mooring mast and controlled by a slide actuator , this mooring carriage having an engagement interface designed to keep the leading edge of the traction wing moored; - a folding carriage designed to slide along the mooring mast and controlled by a slide actuator , this folding carriage having capturing means designed to capture at least one folding line ; - a furling carriage designed to slide along the mooring mast and controlled by a slide actuator , this furling carriage having capturing means designed to capture the furling line ; - a control module for controlling said slide actuators , this control module having at least the following two modes of operation: a folding mode in which the mooring carriage and the folding carriage are moved away from one another; a furling mode in which the furling carriage and the mooring carriage are moved away from one another. <EOS>