The presence of heavy metal in the wastewater has been of great concern to scientists and engineers because of their increased discharge, toxic nature, and other adverse effects on receiving waters. Removal of toxic heavy metal ions from wastewater has received signi?cant attention due to their high impact on environment and public health. Leaking of these toxic heavy metals to the soil contaminates groundwater and surface water leading to serious impacts on the health of human and animals. Many methods that are being used to remove heavy metal ions include chemical preciptation, ion-exchange, adsorption, membrane ?ltration, electro-chemical treatment technologies, etc. Membrane ?ltration technologies with different types of membranes show great promise for heavy metal removal for their high ef?ciency, easy operation and space saving. In this study an electrospun sulfonated poly(ethylene terephthalate) (SPET) nanofibrous mat was applied as a membrane for metal ion filtration. Nanofiber membranes prepared with different conditions and then simulated wastewater containing metal ion as an aqueous solution , an experimental design based on an orthogonal array (OA) L9 (3 4 ) proposed by Taguchi was used. In any case, the transmitted flux (flow per unit area) of the membrane was measured and compared the efficiency of the filtering process. Firstly Membrane with a thickness of 50 micrometers, the average diameter of the nanofibers was in the range of 308-317 nm were made from the polyester polymer. Three metal, copper, zinc and lead, which are harmful heavy metals found in the waste water from dyeing to be selected. The effect of parameters such as initial concentration, amount of adsorbent, pressure, pH soluble on absorption, have been studied. The results showed that the metal ion rejection increased with increasing adsorbent concentration and the pH of solution, decreased by increasing applied pressure and concentration of solution. pH change in the efficiency of metal removal is the most effective and then adsorbent concentration, initial concentration of effluent and pressure, respectively second, third and fourth have influence. Spectra ATR–FTIR of the samples before and after filtering membrane translocation showed absorption bands indicating the Absorbed mainly through the reaction between the metal ion and the polyester sulfonated group has been created. Efficiency of Cu, Pb and Zn, respectively, 99.7%, 99.32% and 86.37% of the polymer solution of 24% (w/v) of sulfonated poly(ethylene terephthalate) was prepared in trichloroacetic acid (TFA)/ dichlromethane (DCM) mixture (70:30 v/v), constant flow rate of 0.25 ml/h during electrospining and applied voltage of 20 kV was used to draw the jet from the nozzle in cross-flow filtration system for the concentration in 20 ppm in pressure 1.5 bar the and maximum allowable pH prior to precipitate metal ions, respectively. Filtering mechanism to block the pores of the membrane made ??of metal ion adsorption isotherm for membrane made ??of nano-fiber polyester Freundlich was a significant factor. The maximum adsorption capacity of Cu (II), Pb (II) and Zn (II), respectively Freundlich model 595.26, 534/85 and 154/00 mg/g was shown to have a high capacity to work. Key words: wastewater, heavy metal, nano-fibrous membrane, filtering