A 3D display method and a display device. The method includes: step a: driving first sub-pixels of odd numbered rows of pixels to display a first left eye image, driving first sub-pixels of even numbered rows of pixels to display a first right eye image, driving second sub-pixels of the odd numbered rows of pixels to display a black image, and driving second sub-pixels of the even numbered rows to display a black image; and step b: driving second sub-pixels of the odd numbered rows of pixels to display a second left eye image, driving second sub-pixels of even numbered rows of pixels to display a second right eye image, driving first sub-pixels of the odd numbered rows of pixels to display a black image, and driving first sub-pixels of the even numbered rows to display a black image.