Device and method for forming and keeping large-size liquid drops in microgravity environment

The embodiment of the invention discloses a device and a method for forming and keeping large-size liquid drops in a microgravity environment. The device comprises a liquid drop attachment mechanism, a liquid supply mechanism and a liquid pipeline, wherein an attachment surface is formed on the surface of the liquid drop attachment mechanism; the liquid supply mechanism is used for supplying experimental liquid to the attachment surface; the liquid pipeline is used for communicating the liquid drop attachment mechanism with the liquid supply mechanism, wherein the attachment surface is a groove which is formed by inwards sinking from at least part of the surface of the liquid drop attachment mechanism, a fluid passage which is communicated to the groove is formed in the liquid drop attachment mechanism in a penetrating manner, and a liquid outlet of the liquid supply mechanism is communicated with the fluid passage. According to the invention, through the design of the liquid drop attachment mechanism with th