Abstract: In order to study influence of direct metal laser deposition process parameters on the process efficiency, a self-developed HCX60 five-axis laser composite manufacturing center was adopted to carry out Taguchi experiment for process efficiency. Signal-to-noise ratio analysis, range analysis and variance analysis were used to analyze the results. The influence of laser power, powder feed rate, scanning rate, lifting capacity and overlap ratio on process energy efficiency was discussed and the optimum combination of technological factors was put forward. The results show that, powder feeding rate is the most significant parameter for the process of energy efficiency. The best combination of parameters is laser power P of 500W, powder feeding rate f of 28g/min, scanning speed v of 600mm/min, lifting capacity h of 0.6mm and overlap rate λ of 30%. The research provides theoretical and experimental grounds for further studying the effect of process parameters on process energy efficiency and its influence rule.