The mechanical properties and material volume fractions of PTFE/Kevlar49/PA6 composite are studied. The focus of this paper is to get the relationship between the volume fraction of three constituents and the mechanical properties of the composite by doing tensile, hardness and wear test.The effect of the constituent volume fractions was evaluated. Short Kevlar49 fibers reinforced PA6(Polyamide 6) with PTFE filler were studied in five different combinations. The results of the experiments show that the mechanical properties increase with Kevlar fibers increase,then they decrease after the Kevlar fiber volume reaches one number.