概述了近１０多年来大洋中脊构造分段研究方面的某些新成果，重点介绍洋脊分段现象、分段结构和层次、分段机制和洋脊分段逐步扩展过程，并以大西洋中脊的宏观分段现象和分段扩展过程为例，提出洋脊超１级分段的初步构思，进而简要探讨了洋脊分段研究的构造意义。 This paper summarizes some new achievements in the study of the mid-oceanic ridges in the recent 10 years, and mainly introduces the phenomenon of the ocean ridge segments, the sub-section structure and level, the sub-sectioning mechanism and the stepwise expansion of the ocean ridge segments. As an example, we propose a preliminary idea about the subdivision of the oceanic ridge over a scale of 1, and then briefly discuss the tectonic significance of the study on the oceanic ridge segment.