Abstract: This paper introduces the current situation of coal mine and supervision informatization in Chongqing and analyzes the main problems. A unified coal mine data standard specification protocol was studied and formulated, a coal mine safety production comprehensive supervision information platform was designed and built. The platform consists of access layer, transport layer, infrastructure layer, data resource layer, application support layer and application layer. It has subsystems such as online access security monitoring, personnel positioning, video monitoring, major mechanical and electrical equipment monitoring. The platform has functions of coal mine basic data management, online real-time monitoring, historical data statistics and big data analysis and integrated portal, etc. It provides visual presentations for desktop computers, scheduling exhibitions, and intelligent terminal APP. At present, the platform has become an important means for coal mine safety supervision and an important basis for accurate supervision. It has improved the efficiency of supervision and innovated the supervision mode. It's of great significance to reduce coal mine safety accident.