A switched-mode control circuit for adjusting correlated color temperature CCT based on linear drive LED lighting, comprising: an AC power supply module; an LED lighting module; a switched-mode CCT control module; and a linear drive control module; wherein the LED lighting module is powered by the AC power supply module, and the LED lighting module comprises a first group of LEDs and a second group of LEDs arranged in parallel and each having different correlated color temperatures; the switched-mode CCT control module is connected to the AC power supply module and the LED lighting module, and is configured to control turn-on and off of the first group of LEDs and the second group of LEDs to control the correlated color temperature of the LED lighting module; the linear drive control module is connected to the AC power supply module and the LED lighting module, and is configured to control and adjust illuminance of LEDs in the LED lighting module; and wherein the switched-mode control circuit further comprises a CCT adjustment module connected between the first group of LEDs and the second group of LEDs, and the CCT adjustment module is configured to adjust the correlated color temperature of the LED lighting module to be a correlated color temperature of the first group of LEDs, a correlated color temperature of the second group of LEDs or a mixed correlated color temperature of the first group of LEDs and of the second group of LEDs; and characterised in that the CCT adjustment module comprises a first resistor unit, a first diode, a second diode and a second resistor unit; the first resistor unit comprises a plurality of resistors arranged in parallel; the second resistor unit comprises a plurality of resistors arranged in parallel; one end of the first resistor unit is connected with the first group of LEDs and the other end of the first resistor unit is connected with an anode of the first diode; a cathode of the first diode is connected to a cathode of the second diode and to the switched-mode CCT control module, and an anode of the second diode is connected to one end of the second resistor unit, and the other end of the second resistor unit is connected to the second group of LEDs. an AC power supply module; an LED lighting module; a switched-mode CCT control module; and a linear drive control module; wherein the LED lighting module is powered by the AC power supply module, and the LED lighting module comprises a first group of LEDs and a second group of LEDs arranged in parallel and each having different correlated color temperatures; the switched-mode CCT control module is connected to the AC power supply module and the LED lighting module, and is configured to control turn-on and off of the first group of LEDs and the second group of LEDs to control the correlated color temperature of the LED lighting module; the linear drive control module is connected to the AC power supply module and the LED lighting module, and is configured to control and adjust illuminance of LEDs in the LED lighting module; and wherein the switched-mode control circuit further comprises a CCT adjustment module connected between the first group of LEDs and the second group of LEDs, and the CCT adjustment module is configured to adjust the correlated color temperature of the LED lighting module to be a correlated color temperature of the first group of LEDs, a correlated color temperature of the second group of LEDs or a mixed correlated color temperature of the first group of LEDs and of the second group of LEDs; and characterised in that the CCT adjustment module comprises a first resistor unit, a first diode, a second diode and a second resistor unit; the first resistor unit comprises a plurality of resistors arranged in parallel; the second resistor unit comprises a plurality of resistors arranged in parallel; one end of the first resistor unit is connected with the first group of LEDs and the other end of the first resistor unit is connected with an anode of the first diode; a cathode of the first diode is connected to a cathode of the second diode and to the switched-mode CCT control module, and an anode of the second diode is connected to one end of the second resistor unit, and the other end of the second resistor unit is connected to the second group of LEDs.