FIELD: towing devices. SUBSTANCE: invention relates to towing devices for autotractor trains. The towing stabilizing device of a single-axle trailer contains a traction lever, connected by the front part with the tractor through a hinged mount, made in the form of a cruciform hinge, equipped with a cross, formed from a horizontal axis and a kingpin fixedly connected to each other. The horizontal axis of the cross is connected to the traction lever by means of a fork. The kingpin is fixed with the possibility of rotation relative to its axis in the upper and lower lugs of the fork-flange. On the upper eye of the fork-flange, a slider is installed with the possibility of longitudinal movement in the horizontal plane, connected to the fork-flange by means of a double-acting working power cylinder. The upper end of the kingpin is connected to the slider by means of a ball joint, and the lower end of the kingpin is connected to the lower lug by means of a ball joint with the possibility of axial and circular movements relative to the fork. The lower lug of the fork-flange is connected to the traction lever by means of a supply power cylinder. EFFECT: stabilization of the rectilinear movement of the trailer on roads with uneven longitudinal profile and increased safety of the road train under operating conditions. 1 cl, 4 dwg.