计算机数字重现全息图可消除像差、噪声及记录过程中底片非线性等因素的影响，与可见光重现相比有更大的灵活性。对短波长全息如Ｘ射线全息、电子全息来说，数字重现可大大提高其重现分辨率。本文给出了全息图数字重现的理论公式，利用理想全息图的强度分布数据成功地重现了同轴和离轴全息图，并对重现结果作了分析。 The computer-generated digital holograms eliminate the effects of aberrations, noise and film non-linearity during recording, giving them greater flexibility than visible light reproduction. For short-wavelength holograms such as X-ray holograms, electron holograms, digital renditions can greatly improve their reproducibility of resolution. In this paper, the theoretical formula of digital reproduction of holograms is given. The co-axial and off-axis holograms are successfully reproduced using the intensity distribution data of the ideal hologram, and the results of the reconstruction are analyzed.