Modern technological advances, human beings are increasingly dependent on electronic products, in order to allow electronic technology products smooth operation, it is necessary to provide energy, and therefore derive "wireless charging" power supply of this type for humanity life on the application of greater convenience.Current wireless charging way is to use electromagnetic induction charging, and this charging method is to use the principle of electric magnetism, a magnetic field, then the energy of the generated magnetic field, the power of the energy source can be used, through a means a series of original electric power converted into magnetic, then the power received by the receiver, receiving magnetic field energy to convert it into electric power energy, whereby the energy to electricity with a power demand required to make up the apparatus.Through this principle charging electric energy transmission, energy loss significantly resulting in reduced conversion efficiency, the present paper will for wireless charging technology, how to improve the low-power wireless charging the prior art, and deletion of the short distance to improve the energy conversion power.