The invention discloses a backlight LED driving circuit for realizing current sharing and high-efficiency dimming. A power circuit consists of a power switching tube S<1>, a main inductor L, fly-wheel diodes D (i is 1, 2, until n), filtering capacitors C (i is 1, 2, until n), a current sampling resistor R, resonant capacitors C (i is 1, 2, until n-1), and resonant inductors L (when n is an even number, k is 2, 4 until n/2), and when n is an odd number, k is 3, 5 until (n-1)/2). A control circuit consists of a driving circuit, a comparator, an error amplifier, a dimming controller and the like; the size of i is controlled by adopting a voltage control mode; the i is controlled to be V/R; and by regulating the size of the V, pulse width dimming and simulation dimming functions can be realized. The backlight LED driving circuit can realize current sharing and high-efficiency dimming, is simple in control, and has the characteristics of low voltage stress and high load working range.