In the current literature,the planar transmitting coil and planar receiving coil are mostly used in the market to achieve magnetic coupling resonant radio energy transmission,but the disadvantage is that the transmission efficiency is not high.To solve this problem,a new concave transmitting coil was designed and made.The magnetic field distribution was measured by fluxgate sensor.The results show that the magnetic field distribution of the concave transmitting coil is more convergent to the central axis than that of the planar transmitting coil.The experimental circuit was set up for comparison experiment.The results show that for the same planar receiving coil,the transmission efficiency of the concave transmitting coil is significantly improved by 10% compared with that of the planar transmitting coil.