The construction of medium wave antennas is seriously restricted by the problems of large area, high cost of land acquisition and poor layout of the site. In order to reduce the medium wave antenna area and to improve the utilization rate of the towers, the layout and the feed network of antenna are optimized. The double-frequency tower matching network, blocking network and colocation tower antenna radiation characteristics are studied, then the solution of three towers with six frequency is given. Finally, through simulation verification, the corresponding network, antenna performance parameters of the geometric structure and radiation are given.