Abstract: Key factors affecting the quality of turbine oil were analyzed including lube base oil quality, blending process and so on. It was found that the quality of turbine oil was depended on the air release value, anti-emulsion performance and water content of lube base oil. In blending process, the blending temperature should be in the range of (55±5) ℃, the mass fraction of emulsion inhibitor should be in the range of 100—200 μg/g, prior to blending the main additive complex should be diluted by base oil. To ensure qualified turbine oil, it is essential to avoid any miss blending of other oil products in turbine oil during blending process, storage and transfer