Insulation resistance detection circuit, equipment and vehicle

The utility model provides an insulation resistance detection circuit, equipment and a vehicle. The insulation resistance detection circuit comprises a live wire L, a zero wire N, a first insulation resistor, a second insulation resistor, a first detection resistor, a second detection resistor, a DC power supply, a sampling circuit, a controller and a first ground wire. One end of the first insulation resistor is connected with the live wire L, the other end of the first insulation resistor is connected with the first ground wire, one end of the second insulation resistor is connected with the zero wire N, and the other end of the second insulation resistor is connected with the first ground wire. The insulation resistance detection circuit can accurately measure the voltage value of the first detection resistor and the voltage value of the second detection resistor under the condition that the AC power supply supplies power or does not supply power, so as to judge whether the insulation resistance fails or n