The utility model discloses a withstand voltage and precision integration tester of mutual -inductor belongs to electric power test instrument field, which comprises a housin, inside power -frequency withstand voltage test unit, the precision test unit of setting up of casing, one side of casing sets up display screen and shift knob, the display screen pass through the data line with power -frequency withstand voltage test unit with precision test unit connection, the display screen below is equipped with primary winding incoming end and secondary signal connection end, the primary winding incoming end with secondary signal connection end through the wire with power -frequency withstand voltage tests the unit connection, the primary winding incoming end with secondary signal connection end through the wire with precision test unit connection. The utility model discloses with the high -voltage insulation test and the unification of precision testing capabilities of sensor, the degree of integrating of improvement tester shortens the manual testing time, has improved efficiency of software testing, is favorable to the big test of mutual -inductor in batches.