Crystallization transformation kinetics of Cu45Zr45Ag7Al3 bulk metallic glasses in non-isothermal (continuous heating) modes were investigated by differential scanning calorimetry (DSC). Activation energy for crystallization at different crystallized volume fractions was analyzed in Kissinger method. Then non-isothermal transformation kinetics was described with the Kempen model. Under the condition of continuous heating, the characterization temperature Tg,Tx and Tp of amorphous alloy Cu45Zr45Ag7Al3 increase with the heating rate, and the super-cooled liquid phase zone also expands gradually. The activation energies of Cu45Zr45 Ag7 Al3 bulk metallic glasses are 431.1, 307.2, 339.5 kJ·mol-1 and the exponent n are 5.2 and 1.9. The results have indicated that the crystallization processes for all the glassy alloys are polymorphic crystallization controlled by interface.