The present invention provides a display device and a driving method thereof. The display device comprises: a display panel comprising a plurality of pixel cells; a data driving module configured to provide data signals to pixel cells; a gate driving module to provide scanning signals to the pixel cells; and a switch driving module configured to provide switch signals to the pixel unit when an image displayed on the display panel is switched, wherein the switch signals indicate whether the pixel cells emit light or not, switch signals include a plurality of first level signals and a pluralityof second level signals which are arranged at intervals in a first period of time, the first level signals indicate that the pixel cells emit light, the second level signals indicate that the pixel cells do not emit light, and the sum of the durations of the second level signals is less than or equal to the sum of the durations of the first level signals. The display device and the driving methodthereof can improve display ghosting.