We investigate the photoluminescence properties of Cr3+:ZnWO4 single crystals which channels all the fluorescence into the broadband 4T2(t22e) to 4A2(t32) transition at about 990nm wavelength. Experiment results of the absorption spectra and the excitation spectrum, temperature dependence of the emission spectra, decay curves of Cr3+ ions are presented and discussed. The most efficient excitation wavelength is in the red region. Radiative decay from the luminescence level to the ground level is characterized by broad emission bands as a consequence of a strong electron-phonon interaction ——Hua-Rhys factor S(300K)=4.22, S(12.7K) = 7.09, the average pho-non energy hv(300K)=405cm-1, hv(12.7K)=213cm-1. The zero-phonon transition line probably is at wavelength of 856.7nm. If there are two kinds of Cr3+ center, one is compensated by the adjacent vacancy(1.8μs), and the other is compersated nonl-ocally (5.45μs).