An LED driving circuit, comprises a rectification module, a switching module and a voltage regulator; wherein an input of the rectification module is configured to receive external power supply (L, N) of the LED driving circuit, and an output of the rectification module is connected to a reference level terminal of the voltage regulator; wherein an anode terminal of the voltage regulator is grounded, and a cathode terminal of the voltage regulator is connected to the switching module; wherein the switching module is adapted to be connected in series with an LED module to form a power supply loop; wherein the switching module is adapted to be turned off according to an off command output by the voltage regulator to cut off a power supply of the LED module, when a voltage of the external power supply (L, N) is greater than a preset voltage, the LED driving circuit being characterized in that: the switching module comprises a first resistor, a second resistor, a first one-directional conduction element, a switch and a constant current driving unit; a first terminal of the first resistor is connected to the cathode terminal of the voltage regulator, and a second terminal of the first resistor is connected to a negative electrode of the first one-directional conduction element; the first terminal of the second resistor is connected to a positive electrode power supply terminal of the LED module, and the second terminal of the second resistor is connected to a positive electrode of the first one-directional conduction element; the input of the constant current driving unit is connected to the positive electrode of the first one-directional conduction element, and the output of the constant current driving unit is connected to a control terminal of the switch; and the first terminal of the switch is connected to a negative electrode power supply terminal of the LED module, and the second terminal of the switch is grounded. wherein an input of the rectification module is configured to receive external power supply (L, N) of the LED driving circuit, and an output of the rectification module is connected to a reference level terminal of the voltage regulator; wherein an anode terminal of the voltage regulator is grounded, and a cathode terminal of the voltage regulator is connected to the switching module; wherein the switching module is adapted to be connected in series with an LED module to form a power supply loop; wherein the switching module is adapted to be turned off according to an off command output by the voltage regulator to cut off a power supply of the LED module, when a voltage of the external power supply (L, N) is greater than a preset voltage, the LED driving circuit being characterized in that: the switching module comprises a first resistor, a second resistor, a first one-directional conduction element, a switch and a constant current driving unit; a first terminal of the first resistor is connected to the cathode terminal of the voltage regulator, and a second terminal of the first resistor is connected to a negative electrode of the first one-directional conduction element; the first terminal of the second resistor is connected to a positive electrode power supply terminal of the LED module, and the second terminal of the second resistor is connected to a positive electrode of the first one-directional conduction element; the input of the constant current driving unit is connected to the positive electrode of the first one-directional conduction element, and the output of the constant current driving unit is connected to a control terminal of the switch; and the first terminal of the switch is connected to a negative electrode power supply terminal of the LED module, and the second terminal of the switch is grounded. the switching module comprises a first resistor, a second resistor, a first one-directional conduction element, a switch and a constant current driving unit; a first terminal of the first resistor is connected to the cathode terminal of the voltage regulator, and a second terminal of the first resistor is connected to a negative electrode of the first one-directional conduction element; the first terminal of the second resistor is connected to a positive electrode power supply terminal of the LED module, and the second terminal of the second resistor is connected to a positive electrode of the first one-directional conduction element; the input of the constant current driving unit is connected to the positive electrode of the first one-directional conduction element, and the output of the constant current driving unit is connected to a control terminal of the switch; and the first terminal of the switch is connected to a negative electrode power supply terminal of the LED module, and the second terminal of the switch is grounded.