The present invention provides an LED backlight color temperature adjustment circuit, including a driving chip, an LED backlight module and a control module. The driving chip includes: a driving unit, employed to drive a display panel to show an image; an image data extraction unit, extracting a present display image data of the display panel; an image data analysis unit, employed to calculate a deviation value of the color temperature of the present display image data and a standard color temperature; and a color temperature adjustment unit, employed to generate and output a color temperature adjustment according to the deviation value of the color temperature of the present display image data and the standard color temperature. The LED backlight module includes a plurality of first LEDs which are identical and coupled in series and a plurality of first LEDs which are identical and coupled in series.