Filament yarn cladding yarn device for spinning frame

The utility model provides a filament yarn cladding yarn device for the spinning machine, comprising a cradle, a leather roller, a roller and a filament yarn tension control mechanism. The utility model is characterized in that: the filament yarn tension control mechanism comprises a filament yarn tension roller and a filament yarn tension roller support which is fixed on the cradle; the filament yarn tension roller support is composed of a smooth flat bottom plate and two sides walls which are vertically arranged on the right and the left two sides of the bottom plate; the two vertical side walls are symmetrically provided with a filament yarn tension roller fixing embedded slots; the axes on the both ends of the filament yarn tension roller are respectively embedded in the corresponding fixing embedded slots; the surface of the filament yarn tension roller is contacted with the smooth flat bottom plate. The utility model has reasonable structure, which can accurately control the tension force of the filament yarn, and cause the tension force of the filament yarn on the spinning machine to keep constant and uniform.