Based on brief introduction of the conception of underwater terrain-aided navigation,the key problems and research progress of underwater terrain-aided navigation were introduced from the view of terrain-aided navigation algorithm,underwater digital map technology,and experimentation.The direction of research and development of application was pointed out as well.%在简要介绍水下地形辅助导航基本概念的基础上，从地形辅助导航算法、水下数字地图技术、水下地形辅助导航试验等方面，详细介绍了水下地形辅助导航所涉及各方面的主要问题及研究进展，并对下一步研究方向及应用做出指引与展望。
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