Direct-current insulation and voltage resistance tester

The utility model discloses a direct-current insulation and voltage resistance tester, which belongs to the field of device testing and comprises a testing box, a damping mechanism is arranged at the bottom of the testing box, a ventilation mechanism is arranged on one side of the testing box, a heat dissipation mechanism is arranged in the ventilation mechanism, and a conductive mechanism is arranged at the top of the testing box. A filter box is slidably connected to the interior of the test box, a first filter screen is mounted in the filter box, filter cotton is mounted on the other side of the first filter screen, and a fixing mechanism is mounted on the other side of the test box; according to the utility model, through the heat dissipation mechanism, the supporting rod, the first motor, the fan blades, the filter box, the first filter screen and the filter cotton, air entering the direct-current insulation and voltage-withstanding tester can be better filtered when the direct-current insulation and vol