Abstract: There are many kinds of subsystems in the coal mine safety production monitoring system, and the types of equipments in the subsystems are multifarious, which leads to the low semantic completeness of data and the fragmentation of information interaction data caused by the heterogeneous information of equipment. At present, although the research of coal mine informatization construction has basically realized the network integration of each subsystem, the massive data obtained can not be effectively shared, and the integration analysis can not be carried out. In order to solve the above problems, this paper proposes an information model of coal mine safety production monitoring system based on OPC UA. According to the relevant information of coal mine safety production monitoring system and the general modeling rules of OPC UA information model, the mapping relationship between actual equipment of coal mine safety production monitoring system and information model is analyzed, and the overall structure of information model of coal mine safety production monitoring system is proposed. It is pointed out that when new functions need to be extended in coal mine safety production monitoring system, they can be extended in function set. When new equipment needs to be added to the subsystem, new components can be added to the equipment set to ensure the extensibility of the information model. Taking the information model of gas extraction monitoring system as an example, the information model of methane sensor is established by using UaModeler tool. After the information model is graphically designed, the XML description file is generated and imported into the address space of OPC UA server. Through the third-party client UaExpert connecting server to test the information model of the OPC UA, the results show that the information model can realize the mapping in the address space of the OPC UA according to the mapping rules, and access the server's address space through the OPC UA client. The attributes of any object in each coal mine safety production monitoring subsystems can be obtained, which verifies the feasibility of using the OPC UA information model to realize the information interconnection.