In this paper, the authors present the simulation results of molecular dynamics of structure and crystallization processing in nickel with the pair Pak-Doyama potential. The crystallization of nickel is investigated through the mean energy potential, the radial distribution function, the coordination number distribution and the 3-D visualization methods. The simulation result reveals that when the sample 300 K is relaxed for a long time, the amorphous structure of nickel slightly changes meanwhile its structure is transformed from the amorphous into crystalline structure when the sample 900 K is relaxed for a long time.