A silicon-controlled-rectifier dial dual-dimming drive circuit for a light source assembly, the silicon-controlled-rectifier dial dual-dimming drive circuit comprising: a silicon-controlled-rectifier dimmer, configured to introduce an alternating current and set a corresponding conduction angle according to a silicon-controlled-rectifier control signal; a rectifier module, connected with the silicon-controlled-rectifier dimmer and configured to rectify a voltage signal output by the silicon-controlled-rectifier dimmer to generate a direct current; a dial switch module, configured to select a dimming and color-adjusting gear and output a color-adjusting control signal and a dimming control signal according to the dimming and color-adjusting gear; a color-temperature control module, adapted to be connected with the light source assembly and configured to adjust a current of each light emitting unit in the light source assembly according to different switching duty ratios; a silicon-controlled-rectifier detection module, connected with the rectifier module and configured to detect the conduction angle of the silicon-controlled-rectifier dimmer according to the direct current and generate a silicon-controlled-rectifier conduction angle signal; and characterised by: a driving adjusting module, connected with the rectifier module, the dial switch module and the light source assembly and configured to receive the dimming control signal, collect a current output by the light source assembly and adjust the direct current according to the dimming control signal and a collection result; and a control module, connected with the dial switch module, the driving adjusting module, the color-temperature control module and the silicon-controlled-rectifier detection module, configured to generate a first pulse width modulation signal according to the color-adjusting control signal and send the first pulse width modulation signal to the color-temperature control module so as to adjust a switching duty ratio of the color-temperature control module, and further configured to generate a second pulse width modulation signal according to the silicon-controlled-rectifier conduction angle signal and send the second pulse width modulation signal to the driving adjusting module so as to adjust the direct current. a silicon-controlled-rectifier dimmer, configured to introduce an alternating current and set a corresponding conduction angle according to a silicon-controlled-rectifier control signal; a rectifier module, connected with the silicon-controlled-rectifier dimmer and configured to rectify a voltage signal output by the silicon-controlled-rectifier dimmer to generate a direct current; a dial switch module, configured to select a dimming and color-adjusting gear and output a color-adjusting control signal and a dimming control signal according to the dimming and color-adjusting gear; a color-temperature control module, adapted to be connected with the light source assembly and configured to adjust a current of each light emitting unit in the light source assembly according to different switching duty ratios; a silicon-controlled-rectifier detection module, connected with the rectifier module and configured to detect the conduction angle of the silicon-controlled-rectifier dimmer according to the direct current and generate a silicon-controlled-rectifier conduction angle signal; and characterised by: a driving adjusting module, connected with the rectifier module, the dial switch module and the light source assembly and configured to receive the dimming control signal, collect a current output by the light source assembly and adjust the direct current according to the dimming control signal and a collection result; and a control module, connected with the dial switch module, the driving adjusting module, the color-temperature control module and the silicon-controlled-rectifier detection module, configured to generate a first pulse width modulation signal according to the color-adjusting control signal and send the first pulse width modulation signal to the color-temperature control module so as to adjust a switching duty ratio of the color-temperature control module, and further configured to generate a second pulse width modulation signal according to the silicon-controlled-rectifier conduction angle signal and send the second pulse width modulation signal to the driving adjusting module so as to adjust the direct current.