The utility model provides a miniaturized mining identification card, this identification card include the casing and set up at the inside electrical component of casing, the casing includes upper cover, lower cover and sealing washer, the bottom of upper cover is equipped with the circumference boss, the top of lower cover be equipped with with boss and sealing washer matched with seal groove, the upper cover is detachable fixed connection with the lower cover, electrical component includes circuit board and battery, battery detachably fixes on the circuit board, circuit board detachably fixes at the upper cover inboardly. The utility model discloses can effectively solve on -the -spot installation and carry inconvenient problem, have advantages such as compact structure, security height, convenient, the on -the -spot mounting means optional of battery maintenance change.