FIELD: traction-coupling devices. SUBSTANCE: invention relates to traction-coupling devices of autotractor trains with trailers. The stabilizing trailer hitch contains a traction lever fixedly connected to the frame of a single-axle trailer with its rear part, and connected to the tractor through a hinged fastening by its front part. The articulated fastening is made in the form of a cruciform hinge provided with a crosspiece formed from mutually perpendicular king pins and a horizontal axis, fixedly connected to each other. The horizontal axis of the cross is connected to the traction lever by means of a yoke, and the kingpin is rotatably fixed in the upper and lower lugs of the yoke-flange. On the upper lug of the fork-flange there is a cylindrical slider with the possibility of rotation about the vertical axis and the possibility of transverse movement relative to the upper lug in the horizontal plane. The slider is provided with a toothed rim engaged with a toothed rack fixedly fixed on the upper lug transversely to the tractor in front of the kingpin. EFFECT: increased stability and stabilization of the rectilinear movement of the trailer wheels. 1 cl, 4 dwg.