The utility model provides a mining explosion-proof equipment internal humidity control apparatus. The apparatus comprises a main casing, an upper casing, an internal casing, a dehumidizer container, a dehumidizer, a fan and a circuit device. The main body of the internal casing is sleeved by the main casing; the upper casing is installed above the main casing; the dehumidizer container is fixedly arranged in the internal casing; the dehumidizer is arranged in the dehumidizer container; the fan is fixedly arranged in the main casing and blows towards the dehumidizer container; the circuit is arranged in the upper casing and comprises a humiture sensor and a circuit board; and the circuit board is provided with a humidity signal conditioning module, a single-chip microcomputer processing module, a fan start-stop control module, a humidity alarm module, a humidity locking module and a power supply module. The mining explosion-proof equipment internal humidity control apparatus is compact in structure, quite low in cost, high in dehumidifying efficiency, good in effect and high in applicability, is free from a heating device, and can lock mining explosion-proof equipment so as to prevent faults and accidents from causing to the mining explosion-proof equipment due to operation under the condition of excessive humidity.