The invention provides a high-gain energy injection-type push-pull topological structure of an IPT system, a control system and a control method. The IPT system comprises a primary circuit and a secondary circuit, wherein at least one switch tube is also connected to the primary circuit in series, so that on and off of an inverter circuit and a resonant network are achieved through regulating switch-on and switch-off of the switch tube. The at least one switch tube is also connected to the primary circuit in series, and on or off of inverter bridge switch tubes S1 and S2 is controlled through regulating conduction cycles of the switch tubes, so that energy injection of the system is controlled, high-gain output is achieved, the regulating ranges of input gain and output gain are improved and a constant-voltage regulation function is achieved.