This study was to comprehensively analyze effects of wheat and faba bean intercropping in wheat fields on environmental acidification and yield of the crops. Two two-year field experiments, (A and B), were carried out and analysis of the results of the experiments done for effects of wheat and faba bean intercropping on crop yield, energy consumption and environmental acidification based on LCA(life cycle assessment) by comparison. Results showed that in the two experimental fields, intercropped wheat was significantly of 22.04% higher than mono-cropped one in yield on average with land equivalent ratio (LER) being higher than 1, showing obvious intercropping advantage. Compared with monocropped wheat, intercropped wheat decreased by 18.59% and 17.45% in energy consumption and environmental acidification index, respectively, and by 17.42%, 17.68% and 17.82% in emission of SO_x, NH₃ and NO_x, respectively, and hence was 18.96% and17.45% higher in potential of mitigating the environmental impact of energy consumption and environmental acidification of wheat cultivation. In conclusion, wheat and faba bean intercropping can significantly increase yield of the wheat and reduce emission of acidified gases, which are obvious intercropping advantages.