This paper studies the disparity range of stereo image comfort from the quantitative analysis.Firstly,a stereo image is obtained by pixel shift method in the source stereo image.The mean opinion score (MOS) is obta ined through a large number of subjective experiments. Secondly,using the adaptive weight stereo method,the regional disp arity value of stereo images is detected to test the impact on the stereo image comfort of the disparity based on the visual sali ency.Finally,the disparity range of the comfortable stereo image is transformed into the disparity angle by the conversion formula,in order to extend this method to other types of display devices.The experimental results s how that in the experiment display device,the pixels shift to meet the comfort requirements is from －40to 90(th e left 40pixels to the right 90pixels). When the horizontal disparity in the salient region of the stereo image center i s from －0.3882° to 0.8514°,the comfort degree i s within the acceptable range,and the range from －0.2713° can 0.7813° to achieve the best.Finally,this method is extended to common display devices,and can give the comfortable parallax range of common display devices,which provides a reliable basis for the production of st ereo image and video.