熔岩管是洞察月球内部地质特征、火山喷发及月壤形成演化的重要场地之一，同时由于其内部存在温度稳定、防辐射和规避月面小天体撞击等优点，是未来人类建立月球基地的理想场所。月球是距离地球最近的天然天体，月球熔岩管很可能会成为人类实地探测和用作基地建设的优选目标之一。雷达是寻找和探明熔岩管的重要手段之一，总结和归纳月球熔岩管的雷达数据研究成果对未来的月球基地建设等任务具有重要的科学和工程意义。基于雷达数据的成像结果，本文从月表成像的合成孔径雷达（SAR）和次表层内部结构成像的雷达两个方面对月球熔岩管的回波特征进行了梳理。其中，SAR主要有利于识别熔岩管顶部塌陷而形成的陷坑等，SAR图像会因陷坑退化程度的差异而呈现特定的散射特征；内部结构成像的雷达识别埋藏熔岩管的关键在于洞穴顶底界面回波的相位反转特征。基于此，本文对熔岩管的未来科学和工程相关研究提出4点展望。希望文中内容为未来深空探测任务规划中涉及的月球基地选址、科考、地下空间利用等相关工作提供科学依据与参考。

Lava tubes are one of the important sites for insights into the Moon"s internal geological features, volcanic eruptions, and lunar soil formation history. Due to stable internal temperature, radiation shielding capabilities, and ability to avoid impacts from small celestial bodies, lava tubes are ideal locations for future human lunar base construction. The Moon is the closest natural celestial body to Earth, and lunar lava tubes are likely to become one of the preferred targets for human on-site exploration and base construction. Radar is one of the key means to detect and identify lava tubes. Summarizing the research results of radar data on lunar lava tubes has significant scientific and engineering meaning. Based on the radar imaging results, the present study reviews the echo features of lunar lava tubes from two aspects: synthetic aperture radar (SAR) imaging for lunar surface and radar imaging for subsurface internal structure. Among them, SAR is mainly conducive to identifying lunar pits formed by the collapse of the top of lava tubes, where SAR image exhibits specific backscattering characteristics due to the differences of pit degradation degree; the key to the internal structure imaging radar identifying hidden lava tubes is the phase inversion characteristics of the echoes from the cave top and bottom interfaces. Based on these, this paper proposes four prospects for future scientific and engineering-related research on lunar lava tubes. It is hoped that the present content will provide scientific basis and reference for related work such as sites selection, scientific exploration, and utilization of subsurface space for lunar bases in the planning of future deep space exploration missions.