Abstract: The features of electric precipitation technique in coalfired power plant of our country were analyzed. The efficiencyraising and energysaving voltage power source of precipitator was described, due to the development and promotion of which, the EP goes into high efficiency and low energy consumption age from highefficiency and high energy consumption age. Based on continuous innovation in electric precipitation technique, the electrostatic precipitator would be constructed as energysaving, low carbon and green environmentprotective equipment.

Key words: electro-static precipitator, high voltage power supply, back corona, energy saving and emission reducing, intelligent optimization