In order to design the beam-shaping system of Laser Diode Arrays(LDA) and to evaluate the beam quality of LDA availably,effects of non-luminescence of Bar on beam properties of LDA were studied.Based on farfield bi-peak structure of an emitter,a far-field expression model of LDA was proposed.The simulation results agree well with the measured data and the overall error of this model is less than 5% in the more than 95% power region.On the base of this theoretical model and measured data,effects of non-luminescence of Bar on intensity distribution and other properties of LDA were analyzed.The results show that non-luminescences of single Bar or several Bars can not change the far-field bi-peak of LDA after beam transmission exceeds a certain distance,but it can effect on other properties such as peak intensity,the position of peak intensity and the intensity on center axis.The power of LDA is inversely proportion to the number of non-luminescent Bars and do not be effected by position variety of non-luminescent bars.