火星上是否有水以及水的储藏位置和规模，不仅是一个科学问题，更与未来载人登陆火星和火星移民密切相关。作为太阳系中与地球最为相似的行星，火星表面同样覆盖了厚厚的沉积物，但这些沉积物之下究竟有什么，对人类来说一直是个谜。近期，科学家发现，火星中纬度地区的地下储藏着大量纯净的水冰。本文评论火星地下冰川这一发现的意义，讨论了科学家究竟发现了什么、如何证明观测到的物质确实是地下冰层、这些冰层是如何形成的、冰层所记录的历史等相关问题，并展望了未来火星探测中如何利用这些水冰资源。

Is there water on Mars? Where is the location of the water, and how much is their storage volume? It is not only a matter of science, but also related closely to the future manned mission and immigrants to the Mars. As the most similar planet to the Earth in the solar system, the surface of Mars is covered with thick soil layer. However, what is the component beneath these sediments? It is always a mystery for human beings. Recently, scientists have discovered abundant pure water ice in the exposed scraps in the mid-latitude region. This article presented the results and what have been discovered. We discussed the proof of exposed ice in the observed material. The formation of ice scraps and the history of ice records, were also discussed. In the end, we described the utilization of the water ice resources for future Mars missions.