Voltage detection circuit

The utility model discloses a voltage detection circuit which includes a voltage comparator U1. A normal phase input terminal Vin1 of the voltage comparator U1 is connected with divider nodes of two divider resistors R3, R4 between a reference voltage source and a ground; an inverting input terminal Vin2 is connected with divider nodes of two divider resistors R1, R2 between a detected voltage source and the ground; and the output terminal Vout of the voltage comparator U1 is connected with the normal phase input terminal Vin1 through a resistor R5. The voltage detection circuit in the utility model, not only completely eliminates the oscillation problem which is normal to the original circuit, reduces the cost because the field effect transistor is not needed, and meets the characteristics of the detection circuit of the high work stability, low power consumption, high precision, fast response speed, and strong anti-interference ability.