The invention discloses a constant current source type single-phase high-frequency inverter based on a SCC-LCL-T resonant network. The constant current source type single-phase high-frequency inverter based on the SCC-LCL-T resonant network comprises a half-bridge inverting unit X and an SCC-LCL-T resonant network unit Y which are connected with each other, wherein the SCC-LCL-T resonant network unit Y is provided with a switched controllable capacitor (SCC); a resonant inductor L, a first inductor La and a first resonant capacitor Cs of an LCL-T resonant network construct a T-shaped structure; the SCC is connected in series to the capacitor branch of the LCL-T network, and comprises a first third switch tube S3 and a fourth switch tube S4 which are connected in series reversely. The single-phase high-frequency inverter has the advantages of convenience in control, easiness in implementation, capability of realizing ZVS (Zero Voltage Switching) soft switching conveniently, small switching loss, high conversion efficiency, capability of compensating for the influences of input voltage fluctuation and element parameter errors by using the controllable capacitor, capability of ensuring constant current output, and the like.