Abstract: Mechanization,automation and informatization of coal mining are inevilable courses of safe and effective production in coal mine and the technology of machine vision is an important part of automation,informatization,digitization and visualization of mine production.The paper introduced the concept and characteristics of the technology of machine vision,discussed pratical significance of applying machine vision in mine,and indicated its application prospect in mine industry.Finally,the paper analyzed some problems which must be solvel when the technology of machine vision is applied in mine.