The invention discloses a half-bridge resonant wireless energy transmission system and relates to wireless energy transmission. The half-bridge resonant wireless energy transmission system is providedwith a DC power supply, a BUCK circuit, a half-bridge inverter circuit, a first resonator, a second resonator and an auxiliary circuit. A control method comprises the following steps of achieving adjustment of output power and achieving maintenance of resonant states of the system. Wireless transmission of electric energy is carried out through an inductive coupling mode; maintenance of the resonant states of the system under different power conditions is achieved through adding the BUCK circuit to a preceding stage of the half-bridge inverter circuit; and high-efficiency electric energy transmission is achieved.