The present invention discloses a Gamma voltage driving circuit, which comprises a voltage dividing resistor string, which comprises 2n resistors connected in series sequentially, used to divide a reference voltage into 2n Gamma voltages; wherein, n is an integer not less than 1; a reference voltage module, which provides the reference voltage for the voltage dividing resistor string; a voltage selecting module, which is used to selectively output one of the 2n Gamma voltages. The reference voltage module comprises a first reference voltage and a second reference voltage, the first reference voltage is coupled to one end of the voltage dividing resistor string, the second reference voltage is coupled between the 2n/2-th resistor and the (2n/2+1)-th resistor; wherein, the voltage selecting module comprises 2n−1 transmission lines, which respectively connects the voltage dividing nodes of the first to (2n/2−1)-th resistors and the (2n/2+1)-th to 2n-th resistors in the voltage dividing resistor string to a output terminal; and each transmission line is provided with n−1 switching units.