Transmission　Electron　Microscope　(TEM)　and　X-　Ray　Diffraction　(XRD)　were　used　to　investigate　crystallization　of　the　Zr70Cu8Ti7Ni15　bulk　amorphous　alloy,　the　results　show　that　the　edge　region　of　BMGs　sample　produces　nano-size　Nickel　crystals　using　the　method　of　the　ion　thinning　to　make　the　TEM　sample.　The　quantity　of　nano-crystals　is　proportional　to　the　time　of　ion　thinning　and　they　are　not　residual　crystals　in　the　BMGs.　©　(2014)　Trans　Tech　Publications,　Switzerland.