In the specific implementation, referring to FIG. 3, the SCM input control module 42 comprises at least one of a power switch control module 421, a DIP switch control module 422, a key control module 423, a wireless/WIFI control module 424, a human body sensing control module 425, an IR/RF remote control module 426, a touch control module 427 and a sound control module 428. That is, in the circuit for linearly driving LED illumination based on MCU-controlled color temperature switching provided in the present invention, the SCM input control module 42 can use one, two or more of the above control modes. Specifically, the LED bead string 20 at a high color temperature and the LED bead string 30 at a low color temperature in the LED illumination module are connected to the AC power supply module 10. After the LED illumination module receives the voltage input by the AC power supply module 10, by the SCM input module, the ratio of current at the lead strings at high and low color temperatures can be controlled in various different modes such as power switch, DIP switch, key, wireless/WIFI, human body sensing, IR/RF remote control, touch control and sound control, to synthesize the desired two or more different color temperatures.

In the specific implementation, referring to FIG. 4, the color temperature output control module 46 comprises a two-channel PWM color temperature control module 461 and a multi-channel color temperature control module 462. That is, the color temperature output control module 46 in the present invention provides two output modes for regulating the color temperature of the LED illumination module.