Abstract: As an effective method of biodiversity conservation, ecological corridors have become one of the hotspots of global ecological research. However, at present, most of the research focuses on terrestrial ecological corridors, and there is relatively little theoretical and practical research on marine ecological corridors. The study of marine ecological corridors in China is still at the infant stage, and it is an area that needs to be strengthened for marine ecological protection, restoration, and management. This paper reviews the progress of research on ecological corridors globally, introduces the concept and development of ecological corridors, and elaborates on the definition and connotation of marine ecological corridors. Using the knowledge graph visualization software VOS viewer, a systematic analysis of literature published in the field of marine ecological corridors from 1995 to 2023 was conducted, and the hot topics and trends of research in this field over the past 30 years were summarized. A comprehensive review of representative case studies on marine ecological corridors were conducted, and general research process and specific technical methods were systematically summarized. Firstly, selecting the target species and analyzing the life history and other data, secondly, compiling and demonstrating the specific plan for identifying the marine ecological corridors, then carrying out the relevant supplementary surveys and research, and finally, identifying and drawing the spatial boundaries of the marine ecological corridors. The specific technical methods used in this process include the envelope boundary method, the least-cost path method and the hydro-ecological coupling model method, etc. This paper further proposes research in four aspects: first, to strengthen research on the connectivity maintenance mechanism of different biological groups at different scales under the background of global change, so as to lay a solid scientific foundation for the identification and construction of ecological corridors; second, to establish a spatial and temporal identification technology of ecological corridors based on the interdisciplinary establishment of ecological corridors covering a variety of marine species to cope with global change; third, to explore the applicable management mode and control methods, and strengthen the protection, restoration, monitoring and early warning of ecological corridors; fourth, to establish an effective international cooperation framework and develop internationally applicable technical guidelines to provide scientific reference for the overall protection and systematic restoration of marine biodiversity and ecosystems.