The invention relates to a micro or super micro nylon fiber and a method of making the fiber. The technical problems the invention needs to solve is to provide a micro or super micro nylon fiber with the fiber number which can be fewer than 1 denier and the method of making the fiber. The fiber of the invention is characterized in that the fiber contains nylon, a third, a fourth or a fifth main group metal chemical compound in an effective amount and an auxiliary agent-antioxidizing agent also in an effective amount. The making method of the invention is characterized in that a third, a fourth or a fifth main group metal chemical compound and the nylon are melted in advance, mixed together, extruded and shaped, and an additive in agglomerate shape is obtained, wherein, the third, the fourth or the fifth main group metal chemical compound accounts for 5 to 50percent of the total weight of the additive; and then the additive agglomerates and the nylon are melted and spinned.