The invention discloses a single-stage boost inverter, and belongs to the technical field of power electronic converters. The single-stage boost inverter comprises power switch tubes S1, S2, S3, S4 and S5, diodes D1, D2 and D3, an inductor L1 and a capacitor C1; one end of the inductor L1 is connected with one end of an input power supply Uin; the other end of the inductor L1 is connected with theanode of the diode D1; the cathode of the diode D1 is connected with the A end of the power switch tube S1, the A end of the power switch tube S2 and one end of the capacitor C1, respectively; the anode of the diode D2 is connected with the other end of the capacitor C1, the power switch tube S3, the C end of the power switch tube S4 and the anode of the diode D3, respectively; and the cathode ofthe diode D2 is connected with the C end of the power switch tube S1, the A end of the power switch tube S5 and the other end of the input power supply Uin, respectively. Aiming at the problem of lowstep-up ratio of the boost converter in the prior art, the single-stage boost inverter is high in integration level and relatively high in step-up ratio.