Based on the principle of CdZnTe(CZT) pixel array detector,the leakage current characteristic of CZT pixellated crystal is tested and analyzed simultaneously.We fabricated 11 mm×11 mm×3 mm and 4×4 pixel array CZT detector system through the digital pulse processing method.The pulse amplitude spectrum of the CZT detector has been measured for 137Cs 662 keV Gamma source.The average energy resolution of the pixellated detector system is 3.3% and full energy peak FWHM is 21.85 keV.For improving spec...