In this study, the DLC coatings were prepared using the closed field unbalanced magnetron sputtering method. The micro/nano test was employed to measure the coating micro/nano tribological properties. The ball on disc test is used to measure the micro/nano tribological properties. The factor is applied load. By the results from experiments and analysis, the nitrogen current capacity with 1sccm coating reveal the best tribological properties including the lowest wear depth and the lowest friction coefficients. The results show the appropriate nitrogen content can promote the tribological properties of the DLC coating.