A safety system for an unmanned flying object piloted by a user on the ground, the safety system making it possible to reduce the risks of falling of the flying object in case of failure, the safety system comprising: - a canopy support intended to be mounted on the flying object, - a flexible canopy, such as a parachute, disposed on the canopy support, - a winder fixed in a receipt area for the flying object, the winder including a winding drum and an electric motor for driving the drum, - a retaining cable intended to be connected by one of its ends to the flying object and connected to the winding drum by its other end, - a control station for, when a failure in flight conditions of the flying object is detected: o commanding the activation of the canopy support in order to deploy the flexible canopy, o commanding the activation of the electric motor in order to drive the drum in rotation so as to wind the retaining cable on the drum, the safety system including sensors for collecting the distance between the flying object and the receipt area, or the unwound cable length, and/or the tension of the retaining cable, said sensors being chosen among: - sensors intended to be integrated into the flying object for acquiring a position of the flying object, and/or - sensors integrated into the winder for acquiring a wound/unwound cable length, and/or a tension of the cable, characterized in that the control station is programmed to vary the angular speed of rotation of the electric motor during the receipt of the flying object based on: - the distance between the flying object and the receipt area, or - the unwound cable length, and/or - the tension of the retaining cable, said variation consisting in reducing the angular speed of rotation of the electric motor: - when the distance between the flying object and the receipt area or the unwound cable length is less than a threshold, and/or - when the tension of the retaining cable is greater than a threshold tension. - a canopy support intended to be mounted on the flying object, - a flexible canopy, such as a parachute, disposed on the canopy support, - a winder fixed in a receipt area for the flying object, the winder including a winding drum and an electric motor for driving the drum, - a retaining cable intended to be connected by one of its ends to the flying object and connected to the winding drum by its other end, - a control station for, when a failure in flight conditions of the flying object is detected: o commanding the activation of the canopy support in order to deploy the flexible canopy, o commanding the activation of the electric motor in order to drive the drum in rotation so as to wind the retaining cable on the drum, o commanding the activation of the canopy support in order to deploy the flexible canopy, o commanding the activation of the electric motor in order to drive the drum in rotation so as to wind the retaining cable on the drum, - sensors intended to be integrated into the flying object for acquiring a position of the flying object, and/or - sensors integrated into the winder for acquiring a wound/unwound cable length, and/or a tension of the cable, characterized in that the control station is programmed to vary the angular speed of rotation of the electric motor during the receipt of the flying object based on: - the distance between the flying object and the receipt area, or - the unwound cable length, and/or - the tension of the retaining cable, - when the distance between the flying object and the receipt area or the unwound cable length is less than a threshold, and/or - when the tension of the retaining cable is greater than a threshold tension.