The invention relates to a drive method, a compensation processor and a drive device of a liquid crystal display device. The drive method comprises the following steps: a data signal of a current frame is received, the average brightness value of the current frame is acquired, at least two backlight drive pulse signals which have graded duty cycles are generated and output to drive a backlight ifthe difference value between the brightness values of the current frame and the last frame is larger or equal to a preset threshold value. The compensation processor comprises a data analysis module,a data compensation module, a backlight linear filtering module and a pulse generation module. The drive device adopts the compensation processor. The invention realizes the gradient of the brightness of the backlight by adopting a technological measure for generating a plurality of backlight drive pulse signals, thereby solving the problem that the liquid crystal display device suffers from flicker as the brightness of the backlight changes suddenly and improving the display effect of the liquid crystal display device.