Display device and driving method thereof

The invention discloses a display device and a driving method thereof, the display device comprises a display panel, the display panel comprises a plurality of columns of data lines, a plurality of rows of scanning lines, a plurality of pixel active switches, a pixel electrode, a plurality of reset active switches and a plurality of reset data signal lines; the reset data signal lines and the data lines are arranged in a one-to-one correspondence mode, and the reset data signal lines are connected to the drain electrode of the reset active switch and provide a reset data signal for the pixel electrode; the difference value between the voltage value of the reset data signal and the common voltage signal is the offset value of the reset data signal; the difference between the voltage value of the data signal and the voltage value of the common voltage signal is a data signal offset value; if the data signal offset value is an interval from zero to a positive value; the offset value of the reset data signal is a