In the research of color digital holography with CCD-recording and lens-imaging, each monochromatic image could be regarded as an objective image projected on the CCD sensitive plane. Based on single fast Fourier transform (1-FFT) reconstruction method via zero-padding, a new reconstruction method in color digital holography is proposed. According to this method, not only the size of reconstructed images in different monochromatic light is same, but also the influence of lens′s chromatic aberration can be taken into account. The study demonstrates that the influence of lens′s chromatic aberration is equivalent to an offset of reconstructed image apart from ideal imaging plane. Fortunately, in digital holography the reconstructed image has a certain focal depth. Thus, the influence of lens′s chromatic aberration may be ignored in most cases. Depending on nominal lens′s focal length supplied by manufacturer, a reconstructed color image that meets practical requirement can be got.