An LED drive circuit, comprising: a rectifier module configured to convert a received AC voltage into a DC voltage; a constant current drive module connected to the rectifier module, and configured to receive a drive control signal and the DC voltage and generate a constant current drive signal based on the drive control signal and the DC voltage; a switch control module connected to the constant current drive module, and configured to collect the constant current drive signal and generate a switch control signal according to the constant current drive signal; and a switch module connected to the switch control module, and configured to receive the switch control signal and turn on or off according to the switch control signal, characterized in that, a capacitor module connected to the switch module and the rectifier module, respectively; the switch control module comprises a sixth diode, a third capacitor, a first resistor and a second resistor, wherein an anode of the sixth diode serves as a first end of the switch control module and is connected to a first output end of the constant current drive module, a cathode of the sixth diode, a first end of the third capacitor and a first end of the first resistor are connected in common, a second end of the third capacitor and a first end of the second resistor are connected in common to serve as a second end of the switch control module and is further connected to a second output end of the constant current drive module, a second end of the first resistor and a second end of the second resistor are connected in common to serve as a third end of the switch control module and is further connected to a control end of the switch module; and the capacitor module comprises a first safety capacitor and a second safety capacitor, wherein a first end of the first safety capacitor serves as a first end of the capacitor module and is connected to a first output end of the rectifier module, a first end of the second safety capacitor serves as a second end of the capacitor module and is connected to a second output end of the rectifier module, a second end of the first safety capacitor and a second end of the second safety capacitor are connected in common to serve as a third end of the capacitor module and is further connected to a first end of the switch module. a rectifier module configured to convert a received AC voltage into a DC voltage; a constant current drive module connected to the rectifier module, and configured to receive a drive control signal and the DC voltage and generate a constant current drive signal based on the drive control signal and the DC voltage; a switch control module connected to the constant current drive module, and configured to collect the constant current drive signal and generate a switch control signal according to the constant current drive signal; and a switch module connected to the switch control module, and configured to receive the switch control signal and turn on or off according to the switch control signal, characterized in that, a capacitor module connected to the switch module and the rectifier module, respectively; the switch control module comprises a sixth diode, a third capacitor, a first resistor and a second resistor, wherein an anode of the sixth diode serves as a first end of the switch control module and is connected to a first output end of the constant current drive module, a cathode of the sixth diode, a first end of the third capacitor and a first end of the first resistor are connected in common, a second end of the third capacitor and a first end of the second resistor are connected in common to serve as a second end of the switch control module and is further connected to a second output end of the constant current drive module, a second end of the first resistor and a second end of the second resistor are connected in common to serve as a third end of the switch control module and is further connected to a control end of the switch module; and the capacitor module comprises a first safety capacitor and a second safety capacitor, wherein a first end of the first safety capacitor serves as a first end of the capacitor module and is connected to a first output end of the rectifier module, a first end of the second safety capacitor serves as a second end of the capacitor module and is connected to a second output end of the rectifier module, a second end of the first safety capacitor and a second end of the second safety capacitor are connected in common to serve as a third end of the capacitor module and is further connected to a first end of the switch module.