LVT soft composite floor production line extrusion floor substrate by extruder, and then through a set of six-roller composite machine to the substrate and printing layer, wear-resistant layer, anti-slip layer composite at the same time, through the unwinding tension, wear-resistant layer of accurate control of preheating, when unwinding, no wrinkle, no shrinkage, no deformation and other effects, high efficiency of extrusion compound production, product quality stability.