80V2O5-20P2O5-xSb2O3 (VPS) (x =1, 3, 5 mol%) Glasses were prepared.The crystallization stability analysis of VPS glass were investigated.The effect of Sb2O3 on crystallization lower limit temperature (Tcs) and glass transition temperature (Tg) were investigated by differential thermal analysis (DTA), X-ray diffraction (XRD)respectively.The activation energy of crystallization was calculated by Kissinger equation.as to crystallization stability improved.