The invention provides a method for quickly freezing metal fusant, which is characterized by comprising the following steps: selecting a metal system with a low melting point to prepare a metal film of which the thickness is several mu m; accurately placing the film for testing in the central position of the heating area of a sensor, and determining the size thereof; for an amorphous material system, heating the film on a quick thermal analyzer until the film is melted; adjusting the cooling rate of the solidification process to obtain the amorphous critical cooling rate Rc of the system; heating and melting the metal film to cause the metal film at different temperatures; obtaining the time information for the fusant to solidify and crystallize at different temperatures, and obtaining a TTT (temperature time transformation) curve; keeping warm for liquid metal at different temperatures for different time, wherein thermal insulation time is shorter than time for reaching the TTT curve; quickly 'freezing; the liquid metal at the highest cooling rate; and obtaining the 'freezing; structure of an incubated nucleation process at different periods. The controllable quick solidificationmethod provides a reliable technical support for researching fields, such as material tissue evolution, developing new materials, digging the potential performance of traditional metal materials and the like.