The invention discloses a method for preparing amorphous nano-sheets. The method is characterized by comprising the following steps: (1) proportioning block-shaped Cu, Zr and Ti with the purity over 99.9 percent by weight according to the atomicity percentage of Cu being 55 to 65, Zr being 35 to 25 and Ti being 10; (2) putting the proportioned materials into a crucible of an electric arc furnace for melting; (3) melting alloy 3 to 5 times to smash master alloy into power with the diameter between 30 and 50 microns; (4) putting the powder into a stainless steel ball-milling pot and pouring alcohol or acetone into the pot to completely cover the powder and milling balls; and (5) performing ball-milling for 60 to 184 hours at a ball-milling speed between 300 and 500 r/min to obtain nano-scaleflaky amorphous alloy powder. The method for preparing the amorphous nano-sheets has the advantages of no pollution, precise components, no need for vacuum pumping in a ball-milling process, simple equipment and low cost.