Abstract: Application status and needs of coal big data platform were analyzed. Key technologies of construction of coal big data platform were explained in detail from five aspects of fine-grained and wide-range data acquisition, flexible and scalable data storage, multimodal data processing, professional data visualization and high-quality data management, the foundation for collection,storage,analysis and management of coal big data was provided. Collaborative architecture of coal big data management was put forward, suggestions for the construction of coal big data platform was provided from two aspects of technology and management, and ideas for top-level design of big data management was provided.