Abstract: By experimental observation and theoretical study for the demonstration of ＂ space water-film and water-ball＂occurring in Shenzhou-10,it is proved that the quiet thick water-film in the space station is a normal convex mirror. A project that people can make lens by using space surroundings,is also proposed.

Key words: Shenzhou-10, space water-film, surface tension, surface energy, convex mirror