Abstract: The intelligentization of coal mines is the only way for the high⁃quality development of coal industry. The re⁃ search and development of coal mine robot promotes the intelligent coal mines to a high level. Meanwhile，the compre⁃ hensive construction and development of intelligent coal mines provides a broad industrial application scenario for ro⁃ bots’ large⁃scale promotion and application. In this paper，a complete technical system framework of coal mine robot was proposed，and the technical base and product outer edge of coal mine robot were precisely defined. The generalized coal mine robots include single robot，robotic equipment，robot cluster，and unmanned system，etc. This pa⁃ per scientifically expounds the common key technical support for the research and development of coal mine robots， and proposes that through the cross⁃integration with new technologies such as 5G， industrial Internet， big data，Artificial Intelligence and digital twinning，the autonomous and intelligent application level of coal mine robots can be greatly improved. The customized research and development and standardized production of various kinds of ro⁃ bots can be realized through the establishment of a scientific and complete industry⁃standard system for coal mine ro⁃ bots. This paper analyzed the research progress of common key technologies such as explosion⁃proof design，mechanical system innovation，power drive，intelligent sensing，positioning and navigation，and underground communication of coal mine robots，and summarized the current research and application status of all kinds of coal mine robots in Chi⁃ na. The new direction of mine robot research and development in the future is put forward， which includes developing the metamorphic robot to improve its adaptability to underground terrain through the innovation of ro⁃ bot mechanism;promoting the robotic mining system to improve the overall intelligent level of mining equipment and mining efficiency;developing human⁃machine loop integration robot to improve the autonomy and cooperation level of coal mine robots;and speeding up the digital twinning of the whole mine robot system to improve the robots’ normal operation level.