The invention provides a dynamic-adjusting wireless charging system of an electric vehicle and a control method of the wireless charging system. Sensors are used for collecting information, a single chip microcomputer controls a two-level scissors type lifting mechanism, an air gap between a wireless charging vehicle-mounted receiving plate and the ground is adjusted, so that dynamic-adjusting wireless charging of the electric vehicle during driving can be realized, and the wireless charging efficiency is improved. The system mainly comprises an information collection unit, an electronic control unit and an execution unit, wherein the information collection unit is used for collecting vehicle driving information, road conditions and magnetic field information of a charging coil, the execution unit is controlled through operation of the electronic control unit to complete dynamic adjustment of the charging mechanism during driving of the electric vehicle, the wireless charging air gap is reduced on the premise of safety driving, and the wireless charging efficiency is improved.