A method for producing nickel nanopowder is introduced. For this, the present invention relates to a method for producing nickel nanopowder, including: (a) a step of preparing nickel oxide configured in the form of an oxide; (b) a nickel oxide nanopowder production step of pulverizing the nickel oxide so as to produce nano-sized nickel oxide nanopowder; (c) a step of drying the nickel oxide nanopowder; (d) a step of heat-treating the nickel oxide nanopowder so as to produce natural metal nickel nanopowder; and (e) a step of crushing the heat-treated nickel oxide nanopowder.