The research of the industry competitiveness in Xi’an Hi-tech Zone has an important role in promoting the industry competitiveness and shaping the industry characteristics. The paper first constructs the index system and algorithm model based on diamond model and then evaluates the industry competitiveness in Xi’an Hi-tech Zone using the data from the questionnaire. The evaluation result shows that the automotive industry, semiconductor, telecommunication, software and service industry are competitive among Xi’an Hi-tech Zone’s industries, while electronic components industry, mechatronics and medical devices industry ranked last three. Based on this, the paper points that the strategic emerging industries like advanced manufacturing industry, telecommunication etc. are more competitive among Xi’an Hi-tech Zone’s industries and have better development foreground.