According to the need of investigation of criminal cases,we propose a non-destructive,contact-less fingerprint acquisition method based on the digital holography.The setup of the off-axis digital Fresnel holography is built,and the principle of recording and the reconstruction methods of the fingerprint amplitude and phase image are investigated.The surface fitting with the least square method is applied to correct the phase aberration.Experimentally,the clear amplitude and phase images are obtained from the potential and colorless fingerprints which can be left easily on variety of samples by suspects in criminal investigation site.The results demonstrate that the digital holographic fingerprint acquisition method can be used in the police field,especially for colorless fingerprint and the fingerprint with weak intensity information.