The disclosure provides a source driving circuit adapted to a display panel. The source driving circuit includes a data channel and a control circuit. The data channel is configured to be coupled to a data line of the display panel and drive the data line of the display panel sequentially according to first display data and second display data. The first display data corresponds to a first scan line of the display panel, and the second display data corresponds to a second scan line of the display panel next to the first scan line of the display panel. The control circuit is coupled to the data channel and is configured to control a time point that the data channel outputs the second display data according to similarity between the first display data and the second display data.