Square wave alternating current output circuit

The utility model relates to a square-wave alternating-current output circuit, and the circuit comprises an MCU module which is used for accessing a low-voltage direct current, alternately outputting two paths of square-wave frequency signals and two paths of PWM signals, and controlling the duty ratio of the square-wave frequency signals and the two paths of PWM signals at the same time, so as to adjust the voltage alternation time interval of the two paths of square-wave frequency signals and the two paths of PWM signals; the voltage transformation module is electrically connected to the MCU module and is used for converting the low-voltage direct current from the MCU module into alternating current, boosting the alternating current, rectifying the boosted alternating current into high-voltage direct current and outputting the high-voltage direct current; and the alternating current output module is electrically connected to the voltage transformation module, and the alternating current output module is use