Abstract: Helical antennas have wide beam, circular polarization and other characteristics. The axial helical antenna in previous mostly are end-fed, that the feed point at one end of the helical antenna, and placed a ground plane at the feed point, only have one radiation direction. To compensate for this deficiency, a middle-fed axial helical antenna is presented. Calculate the radiation pattern, reflection coefficient, gain, and other parameters of the middle-fed helical antenna based on RWG (Rao-Wihon-Glisson) edge element method of moments using MATLAB. Then simulate the middle-fed axial helical antenna designed before using HFSS. The simulation results of the two methods coincide well to prove the result in simulation is accuracy. Experiments show that the axial helical antenna with middle-fed not only have the advantages of the previous, such as, circular polarization, orientation, high gain and wide bandwidth, etc. also have two same reverse direction and intensity of radiation, the gain of the antenna can be achieved at more than 8 dB and the HPBW (Half Power Beam Width) can be achieved at 33°. This antenna can be applied to multilateral communication and relay communication and other fields.