In order to study the influence of the high voltage transmission lines near the airport on the reception of VOR(Very High Frequency Omnidirectional Range) and DME(Distance Measuring Equipment) signal, test the electromagnetic radiation generated by the high voltage transmission lines near the airport. By controlling and changing the parameters in the calculation model, study the influence law of the transmission line on the electromagnetic interference of aircraft airborne signals, and obtain the maximum height of the aircraft subjected to high-voltage wire EMI(Electromagnetic Interference). According to the radio wave propagation theory and the relevant provisions of national standard, analyze the influence of electromagnetic interference on the airborne signals at this position .The SNR(Signal to Noise Ratio)of the VOR signal received by the aircraft at the maximum height of EMI is 42.7dB, Comply with the requirements of the national standard minimum which is 20dB. DME signal signal-to-noise ratio is 97.3dB, in line with the national standard.On this basis, calculate the protective distance of the high voltage transmission line to the airport VOR/DME station , and propose the suggestion of active interference protection distance between the range of the high voltage transmission line and the airport VOR/DME station .The research results in this paper can provide a basis for the electromagnetic compatibility design of high voltage transmission lines and radio equipment such as airport communication, navigation and surveillance.