针对当前关于行业英语概念理论层面分析研究的不足,依据语言共核理论,利用颜色渐变手法对比基础英语、行业英语和专业英语共核性差异:通过进一步比对基础英语、行业英语和专业英语使用语域的不同,探讨和提出了行业英语的理论定位。研究成果从理论上为行业英语教材的编写和行业英语教学指明了正确方向。 In the light of the current lack of theoretical analysis on the concept of industry English, we compare the differences of basic English, professional English and professional English by using the color grading method based on the common core theory of language: by further comparing basic English, professional English and professional English The different field, to explore and put forward the theoretical position of the industrial English. The research results indicate the correct direction for the compilation of the industry English teaching material and the industry English teaching theoretically.