Inverter welding and cutting starting circuit and electric welding machine

The utility model belongs to the field of inverter welding and cutting starting circuits, and provides an inverter welding and cutting starting circuit and an electric weld.The inverter welding and cutting starting circuit comprises a charging module, a rectifying and filtering module, a starting module and an auxiliary power module, and the charging module is connected with an alternating current interface and comprises a thermistor input channel and a relay input channel; the thermistor input channel comprises a plurality of thermistors connected in parallel, the rectifying and filtering module is connected with the charging module and used for rectifying and filtering alternating current to generate direct current, the starting module is connected with the rectifying and filtering module and used for generating a pulse width modulation signal according to the direct current, and the auxiliary power module is connected with the starting module and the rectifying and filtering module. And the charging module