The treatment of inorganic and organic surfaces is widely examined by plasma treatment, deposition of thin films and processing of materials. The plasma treatment for Surface modification of polymer films is the most effective way of uniform and controlled treatment. Atmospheric Pressure Glow Discharge (APGD) has understand by using a plasma needle of argon. The uniform plasma increases in scale from a small region near the needle tip to a plasma plume with a length of about 20 mm with increasing the applied voltage. In this work Polymer, film (Makrofol) was modified using atmospheric glow discharge at different treatment time. Scanning electron microscope (SEM), atomic force microscopy (AFM) and X-Ray Diffraction (XRD) measurements used to investigate and characterize surface treated polymer. It found that, the change in surface properties depends on the treatment time. Also found that the plasma treatment modifies the polymer surface in both morphology and composition. These behaviors originated from ablation by Ar plasma treatment.