The regularities of formation of binary amorphous alloys of transition metals by mechanical alloying were studied successfully by the Miedema coordinates and the three chemical coondinates with the Miedema parameters, Based on egperimantal data the criteria of formation the binary amorphous alloys were defined as. The total accuracies for separating the amorphous alloys formed or not by mechanical alloying are 80% and 88%，respectively. The physics for describing the regularities for the binary amorphous alloys of transition metals by mechanical alloying, and the relationship between the regularities and necessary conditions for amor-phization by solid state reaction are discussed from the view points of interaction between atoms and thermodynamics and dynamics for amorphization by solid state reaction.