The CaCu(3-x)ZnxTi4O12(x=0, 0.04, 0.08, 0.12) (CCTO) ceramics have been prepared by the solid state reaction. The effects of the change of Zn2+ doping contents on the phase structure and the morphology of CCTO have been investigated by the X-ray diffraction and the scanning electron microscopy, and the low/microwave frequency dielectric properties of CCTO ceramics have also been studied. The results indicate that the addition of small amount of Zn2+ doping can influence the phase structure and morphology of CCTO. All the ceramics show the giant dielectric constant (＞104), and the CaCu2.92Zn0.08Ti4O12 ceramics show the higher dielectric constant, stable temperature dependence of dielectric constant and the lower dielectric loss at the lower frequency. This study is beneficial to design CCTO-based materials and promote their application such as in capacitors. Meanwhile, the dielectric relaxation character exist in the CaCu(3-x)ZnxTi4O12 ceramics at the microwave frequency of (5.85~8.2 GHz) band.