Non-crystalline alloys can be turned into nano-crystalline under shock waves. This has been proved by our experiments.Recently,we have discovered that the functions of Cu and Nb of Fe73.5Cu1Nb3B9Si13.5 in shock wave crystallization are restrained, and the size of crystallites in the crystallized alloy Fe73.5Cu1Nb3B9Si13.5 is increased and its lattice constant is decreased after the sample is annealed again. These phenomena are worth to study further. The model of fluid-change for explaining the law of shock wave crystallization is suggested in this paper.