Abstract: In order to study the environmental influence of the electromagnetic radiation caused by the medium-wave antennas in broadcasting and communication system,the computational model to calculate the electric field strength of the medium-wave antenna has been built based on the Maxwell electromagnetic theories.The distribution of the electric field strength of the medium-wave antennas worked in one tower with one frequency and two frequencies have been simulated.At the same time,we have measured the realistic distribution of the electric field strength at a medium-wave broadcasting station.It drew a conclusion that the electric strength of the antenna decreases quickly with the increase of the horizontal distance.The value of calculating and measure are much less than that of the national standard and both of them are identical well with each other.Resultsof this paper can provide reference for the environmental evaluation of the electromagnetic environment near medium-wave broadcasting station.