To achieve good stereoscopic effect and avoid visual discomfort, an adaptive horizontal parallax adjusting method is presented for stereoscopic images. The depth information in a scene is extracted by feature point matching, obtaining the maximum and minimum depths. An appropriate baseline is obtained after the resetting of baseline based on the current baseline and the maximum and minimum parallaxes acceptable to the human eye, ensuring that the scences are imaged in a comfortable stereo imaging area. The proposed method does not introduce stereo image distortion. The control effect of the proposed method is verified by experiments. Experimental results show that the proposed method can adaptively adjust the parallax and realize strong stereoscopic effect.