Abstract: The gravity effect almost disappears in a micro-gravity environment. The flow characteristics of liquid will be different from itself under the gravity condition. In order to observe the change of the oil droplets, we have built a short-term micro-gravity experimental system, and observed. The image of the oil droplets changing process of the speed and the shape. It is important for the education of the student＇s observation ability, scientific thinking ability through these physics observation experiments.

Key words: micro-gravity, drop-tower, oil drops, physical experiment