The invention relates to a portable air particulate matter purification device, which belongs to the technical field of air purifiers, and comprises a power supply, a direct-current straight high voltage power supply and the like. The power supply is electrically connected with a DC-AC inverter through a device switch, and the DC-AC inverter is then electrically connected with the direct-current straight high voltage power supply so as to supply power to a graphene magnet generator; the graphene magnet generator is made into a hollow cylindrical graphene magnet generator; an air inlet (5) is close to a negative oxygen ion outlet; and an air outlet is connected with a breathing mask through a telescopic pipe. The device is made and placed in a box or a schoolbag with a handle and / or straps so as to be convenient to carry and use by people. The device is made or placed into portable equipment through changing a shape of an original graphene magnet generator, can enable people to breath fresh and clean air through connecting the telescopic pipe and the breathing mask so as to prevent haze from sickening people, is beneficial for work, life and study of people, and has a great market prospect in the economic field of environmental protection.