As the most promising commercial lithium-ion battery, the LiNi1-x-yCoxMnyO2 cathode have become the focus of researchers in recent years. However, there are less researches on the synthetic process of this material. This paper discusses various sintering processes of LiNi0.8Co0.15Mn0.05O2, and the characterization and electrochemical performances testing of the prepared cathode materials. The research shows that the material has higher specific capacity (about 200 mA·h·g-1) at 0.1C (C is battery capacity rating value) charging-discharging rate. At 1C and 100 times of charging-discharging, the capacity retention ratios of 480 ℃@3 h + 780 ℃@5 h and 500 ℃@5 h + 780 ℃@10 h sintering processes are 94% and 86%, respectively, which illustrates the synthetical properties of the cathode materials prepared by these two processes are optimal.