Abstract: This paper focuses on the study of power supply technology of 5G equipment in coal mine. Combined with the comparison of existing power supply modes and the existing problems, this paper comprehensively analyzes the design scheme of power supply in detail, which mainly includes the charge and discharge management mode of large capacity output of power supply, the boost mode of standby pool, the protection mode of intrinsic safety output of power supply and the 5G data transmission mode of power supply.