本文通过对柴油机工作循环热效率分析，认为提高压缩比和使燃烧接近定容过程是高原地区涡流室柴油机的有效节能方法之一。从理论上证明了适当提高压缩比后仍能保持平原地区的结构强度和工作平稳性水平，同时进一步分析认为，提高压缩比后应采用相应的喷油规律。实验研究的结果表明，这种方法对高原地区涡流室柴油机节能是可行的、有效的。 Based on the analysis of the thermal efficiency of the diesel engine working cycle, it is considered that increasing the compression ratio and bringing the combustion near the constant volume is one of the effective methods to save energy in the swirl chamber diesel engine in the plateau region. It is theoretically proved that the structural strength and workability of the plains can be maintained after the compression ratio is properly increased. At the same time, the further analysis shows that the corresponding injection rules should be adopted after the compression ratio is increased. Experimental results show that this method is feasible and effective for energy-saving of vortex chamber diesel engine in plateau area.