The utility model relates to an anti-interference transmission line high voltage insulation resistance test device, its structure includes induced voltage inhibitor and high voltage insulation resistance test unit, the measurement circuit connection of induced voltage inhibitor and high voltage insulation resistance test unit wherein. The control unit in the high voltage insulation resistance test unit is connected with power module, display screen, operating keyboard, high voltage DC dc-to-ac converter, measuring circuit respectively mutually. The induced voltage inhibitor adopts the shunt capacitance method to reduce the basic principle of power line interference during the test, can use the insulation resistance and the nuclear phase of insulation resistance tester test line below 1000V through the induced voltage restriction of induced voltage inhibitor on with the detected circuit. The problem of the existing product existence is solved with not enough, reduce field test personnel's intensity of labour, improve reliability, the accuracy of circuit insulation test and nuclear phase. Avoid testing equipment's damage, had good practical value.