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.　Results　of　this　paper　can　provide　reference　for　the　environmental　evaluation　of　the　electromagnetic　environment　near　medium-wave　broadcasting　station.