Insulation testing device

The utility model belongs to the technical field of insulation testing, and discloses an insulation testing device. The insulation testing device comprises a lower shell, an upper shell, a circuit board assembly, a plurality of resistor elements, a low-voltage binding post assembly and a high-voltage binding post assembly, wherein the lower shell is detachably connected with the upper shell; the circuit board assembly is accommodated in the mounting space; the at least two capacitance measuring switches are installed on the circuit board assembly, each capacitance measuring switch is connected to the corresponding capacitor element, and the capacitance values of the at least two capacitors are different; the plurality of groups of resistance measuring switches are arranged on the circuit board assembly, and each capacitance measuring switch is correspondingly provided with a plurality of resistance measuring switches; the resistance values of the plurality of resistor elements are different, and the resistor