By using the theory of configuration-interaction, we ireade a analysis of the effect of configuration interaction on the autoionization rates and branch ratios of the configurations 2p53s3l(l=0，1，2) for the Nalike Cu ion. It is shown that the autoionization rates in all the three configurations are changed substantially when the configuration-interaction are included in comparing with the calculations in single-configuration approxmation, and the branch ratios increase both in the configuration 2p53s3d and in 2p53s3p but decrease in the configuration 2p53s2.