Abstract: The paper analyzed development process of coal mine automation from single machine automation, integrated automation, mine Internet of Things to mine CPS, indicated that coal mine automation is a process of gradually realizing fusion of information system and mine physical system, and single machine automation, integrated automation, mine Internet of Things and mine CPS are features at different periods in the process. It analyzed problems of integrated automation and mine Internet of Things in actual application of coal mine, namely integrated automation and mine Internet of Things do not consider confidence of information and event, not use mechanism of issue and subscription, not consider uncertain factors in physical world, not take person and his behaviors as factors of coal mine automation system, and indicated that mine CPS is inevitable trend of development of coal mine automation which can make fusion of information system and mine physical system closely.