We have developed a method with auxiliary e-quipment to prepare bulky amorphous alloy by suction casting with copper mould under non-vacuum melting conditions, in which high pure argon flow was employed to protect melting of’alloy, and then the glass melt is introduced into a copper mould to rapidly form a sample or a part through a tube based on negative pressure. The Mg65Cu25Y10 amorphous alloy rod with diameters of 3 mm has been prepared successfully with commercial raw materials using the method. Compared with the other preparing methods, the method has the features of low equipment cost, simple process and convenient operation.