The micro PEM fuel cell stack adopts self-developed membrane electrode and assembly (MEA) technology. The stack has simple structure, light weight, small volume, fast start-up speed, good environmental adaptability and easy to carry. It can be used as power supply for notebooks, UAVs, soldiers and small arms, communication base stations, emergency power supply and other fields. The stack uses a side-hollowed carbon (or stainless steel) bipolar plate, pressure locking and glue sealing process, greatly reducing the volume of the stack. The 12-piece MEA stack has a volume of 6.4 * 4.3* 3.4 cm, a maximum power of 30 watts, a rated power of 20 watts, a rated voltage of 6 volts, a voltage output range of 3 to 11 volts, and a rated current of 5 amperes.