Source driving circuit and display device

The invention discloses a source electrode driving circuit and a display device. The source electrode driving circuit comprises a gamma resistor string, a digital-to-analog conversion circuit and an output cache circuit. The digital-to-analog conversion circuit obtains gamma voltage from the gamma resistor string according to the data signal. The output cache circuit outputs a driving voltage according to the gamma voltage and provides the driving voltage to the data line. The output cache circuit comprises an input stage module, a gain stage module and an output stage module. In the switching stage, the auxiliary input stage unit of the input stage module, the gain stage module and the output stage module form a first unity gain amplifier so as to output the driving voltage according to the received gamma voltage. In the stable stage, the main input stage unit of the input stage module, the gain stage module and the output stage module form a second unity gain amplifier so as to output the driving voltage ac