An insulation resistance measurement circuit comprising: a source resistance unit including a first source resistance unit connected to a positive terminal of an insulation resistance measurement battery and a second source resistance unit, the second source resistance unit being connected to a negative terminal of the insulation resistance measurement battery and the first source resistance unit; a voltage sensing unit including a first operational amplifier sensing a voltage of the first source resistance unit, as a first voltage; a leakage current interrupting unit including a first switch connected to the positive terminal of the insulation resistance measurement battery and the first source resistance unit and a second switch connected to the negative terminal of the insulation resistance measurement battery and the second source resistance unit; a measurement circuit testing unit including a third switch connected to the first operational amplifier and a first voltage source; and an insulation resistance measurement unit measuring insulation resistance of the insulation resistance measurement battery through the first and second voltages, characterised in that the voltage sensing unit further includes a second operational amplifier sensing a voltage of the second source resistance unit, as a second voltage; and the measurement circuit testing unit further includes a fourth switch connected to the second operational amplifier and a second voltage source; wherein the measurement circuit testing unit is adapted to open the first switch and the second switch and to close the third switch and the fourth switch, and is further adapted to measure the first and second voltages (V1, V2) to determine whether or not the first and second operational amplifiers (105, 106) have an error, thereby enabling self-testing. a source resistance unit including a first source resistance unit connected to a positive terminal of an insulation resistance measurement battery and a second source resistance unit, the second source resistance unit being connected to a negative terminal of the insulation resistance measurement battery and the first source resistance unit; a voltage sensing unit including a first operational amplifier sensing a voltage of the first source resistance unit, as a first voltage; a leakage current interrupting unit including a first switch connected to the positive terminal of the insulation resistance measurement battery and the first source resistance unit and a second switch connected to the negative terminal of the insulation resistance measurement battery and the second source resistance unit; a measurement circuit testing unit including a third switch connected to the first operational amplifier and a first voltage source; and an insulation resistance measurement unit measuring insulation resistance of the insulation resistance measurement battery through the first and second voltages, characterised in that the voltage sensing unit further includes a second operational amplifier sensing a voltage of the second source resistance unit, as a second voltage; and the measurement circuit testing unit further includes a fourth switch connected to the second operational amplifier and a second voltage source; wherein the measurement circuit testing unit is adapted to open the first switch and the second switch and to close the third switch and the fourth switch, and is further adapted to measure the first and second voltages (V1, V2) to determine whether or not the first and second operational amplifiers (105, 106) have an error, thereby enabling self-testing.