The invention discloses a fireproof suspended type automatic charging mechanism and a work process thereof. The fireproof suspended type automatic charging mechanism comprises a charging fixed device, a charging movable device, a monitoring device, an orbital machine, a rail and rail supports. The fireproof suspended type automatic charging mechanism is characterized in that the charging fixed device is composed of a charging waterproof shell, a fixed device horizontal sliding plate, a fixed device side plate, a fixed charging seat, an inclined sliding plate, a waterproof sponge, a charger assembly, a button, a waterproof connector, a fixed conductive sheet, a contact piece locating seat and a connecting plate, the charging movable device is composed of a probe locating seat, a movable device side plate, a horizontal sliding plate, an inclined sliding plate, a guide plate, a waterproof connector, a probe, a fastening pin, a movable device connecting plate and a rechargeable battery. The automatic charging mechanism is mainly used for specialized robots.