The utility model discloses a mobile unit is equipped to metal underground mine trolley -bus, including the casing, the casing front side has the opening, and the opening periphery is connected with preceding deckle board, gets around the mouth on the preceding deckle board and has laid confined sealed rubber ring, still include the cap, the cap contacts with seal shell's inner chamber with sealedrubber ring. Install mounting plate in the casing inner chamber, still install radiating block, RFID module, wiFi module, fixed bolster and power in the casing inner chamber, RFID module and wiFi module are installed on mounting plate, the radiating block is installed on the backplate of casing, and opening that mounting plate is last to be had a perfect understanding around being equipped with has the boss that passes opening and the RFID module back and contact on the terminal surface before the radiating block. The utility model discloses not only possess good sealability, it is waterproofdustproof effectual, prolonged the life who installs, the fitting up is firm moreover, and shock resistance is strong. Simultaneously, the casing back can in time be led with the heat through the radiating block to the RFID module, and good heat dissipation has guaranteed the stability of RFID module.