To near east of Zhongguancun Software Park, there are ten circuits consisting of four circuits 220kV and six circuits 110kV high voltage transmission lines under planned construct.For evaluating the electromagnetic environment influences of these high voltage transmission lines on Zhongguancun Software Park, we firstly discussed radio interference phenomena of high voltage transmission line owing to corona, and then analyzed the radio interference level of single circuit 220kV with or no four bundle conduc...