The degradation process of heteroatom organics by high active hydroxyl radicals generated from DC corona discharge plasma was investigated using pyridine as a model pollutant.The electrochemical process could be fully elucidated from the point of view of water droplets，water droplet or cloudy droplet formed the small electrolytic cell.90.4% of pyridine could be removed at 20.75 kV and the initial concentration of pyridine was 8287 mg·m-3.Intermediates in droplet were detected by HPLC，indicating that fumaric acid and oxalic acid were the main intermediates，and nitrate was detected by ion chromatographic.Based on the above results，the possible degradation pathway of pyridine was proposed.