A backlight module, LCD and backlight module driving control method are disclosed. The backlight module includes: a pulse width modulation (PWM) control circuit, a driving circuit, a first white LED set and a second white LED set; the PWM control circuit being connected to the driving circuit, and the driving circuit being connected to the first white LED set and the second white LED set respectively; the PWM control circuit being for controlling the driving circuit to drive the first white LED set and the second white LED set to emit light; in which the first white LED set and the second white LED set having different chroma.