Abstract: The arrival of 5G technology has greatly promoted the in-depth integration of cloud computing, big data and artificial intelligence, and has become a key infrastructure for the upgrading and transformation of various industries including intelligent mining of coal mines, and will certainly promote the innovation and reform of intelligent mining technology of coal mines.Firstly, the development process of intelligent coal mining was expounded and the relevant policy support and technological development trends were summarized.Then, the paper systematically analyzed 8 problems that need to be solved in the application and promotion of intelligent mining technology, namely: automatic face straightening technology, high-definition visualization technology in complex environments, 4D transparent geological construction technology for coal mining multi-field dynamic information fusion, coal and rock automatic identification and intelligent cutting technology, high-quality sensor development and multi-sensor data fusion technology , intelligent technology of mining process, micro-service system platform architecture of intelligent coal mining, intelligent perception and early warning technology of dangerous sources, and elaborated in detail the various restricting factors for technological development, then it proposed that a 5G technology-based technology ecosystem would surely become an effective mean to solve the above problems.Furthermore, based on the relationship between the development of communication technology and coal mining technology, this paper analyzed the characteristics and advantages of current 5G technology in intelligent mining, and pointed out that the features and techniques of 5G technology, such as large bandwidth, ubiquitous interconnection, low latency and high reliability, slicing technology and so on, strongly supported the development of intelligent coal mining development through the construction of core intelligent mining technology and 5G technology ecological correlation matrix, which indicated the importance of 5G technology ecology in intelligent mining of coal mines.Meanwhile, it also showed that with the continuous maturing of the 5G technology ecology, there will be some new key technologies and production management models in intelligent mining of coal mines that need to be explored urgently.Finally, the key applicatios of 5G technology in intelligent mining were explored from various aspects including system calculation, analysis, management and control mode, 4D-GIS transparent geology and real-time deduction, automatic face straightening,video-driven intelligent mining, and underground mining environmental perception, etc.A solution based on 5G technology was proposed for the intelligent mining of coal mines for discussion.