The production and consumption of polyester and polypropylene nonwovens are the most, and so are their wastes. For recycling of textile wastes and environmental preservation, we planned to recycle polyester and polypropylene nonwoven selvages and produce plastic composites. In this study we changed some parameters included compressing temperature, time and the bore diameter of mesh to discuss the influence on their tensile properties. The results revealed that the optimum conditions of the manufacturing process were 190~200℃ for 5~10 minutes at the constant compressing pressure of 60 kgf/cm^2. The tensile strength of the plastic composites was about 17 MPa and their elongation at break was about 7%. At the same time, the effect of fragment size was not obvious on the tensile properties of plastic composites. This shows that the effect of forming conditions of plastic composites on their tensile properties was more important than that of fragments size.