The polyelectrolyte membrane was prepared by interaction between chitosan (CS) and acacia(GA) using glutaraldehyde as linkage reagent, glycerol as plasticizer. The property such as water resistance and tensile strength were studied using single factor analysis. The optimal formula for determining the composite film to determine the better formula of the membrane. FTIR was applied to analysis the function groups of the bipolar membrane. SEM was used to observe its surface structure. XRD was used to analysis the compatibility of membrane components.The results showed that the polymer film has good compatibility, and contains - COOH, - NH3 functional groups with the characteristics of the gender, the film can be stable in acid and alkali solution. The structure and properties were studied and the membrane was a separator in the electrolysis cell to produce thioglycolic acid (TGA). The experimental results showed that thioglycolic acid was prepared effectively by electro-reduction of dithioglycollic acid blended with thioglycolic acid in the cathode room and 25% H2SO4 as the anode electrolyte1.The current efficiency was up to 71.77% at room temperature when current density was 10 mA/cm2