A data driving system of a liquid crystal display panel includes a timing control chip; a plurality of data driving chips; a plurality of first signal lines, which is used to transmit a predetermined data signal from the timing control chip to the plurality of data driving chips, each first signal line being provided between the timing control chip and one of the plurality of data driving chips in order to transmit the predetermined data signal from the timing control chip to the plurality of data driving chips; and a plurality of first transmission gates, each of which is provided on one of the plurality of first signal lines. The data driving system can significantly improve the quality of the received signal of the data driving chip, and can effectively avoid the error of the received signal.