Stepless voltage regulation control circuit of voltage breakdown tester

The utility model provides a stepless voltage regulation control circuit of a voltage breakdown tester. The stepless voltage regulation control circuit comprises a full-bridge inverter circuit and a driving circuit, the full-bridge inverter circuit comprises a direct current input connector H5 which is respectively connected with field effect transistors M1-M4 through a filter capacitor C2; the field effect transistors M1-M4 are respectively connected with the switch connectors H1-H4; the field effect transistors M1-M4 are respectively connected with the follow current inductor L1; the follow current inductor L1 is connected with an alternating current output connector H6; the follow current inductor L1 is connected with an alternating current output connector H6; the driving circuit is provided with four driving connectors P1 to P4 which are respectively connected with the field effect transistors M2, M1, M4 and M3, and the driving connectors are connected with a driving chip of the driving circuit. Accordin