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The crystallization behavior of Zr Al Ni Cu bulk amorphous alloy during continuous heating is investigated. The results show that with increasing of heating rates, all the specific temperatures (Tg, Tx, and Tp) shift to the high temperature region, and the crystallization enthalpy and the enlarged supercooled liquid region increase, while the crystallized volume fraction corresponding to the peak temperature Tp decreases. Using Kissinger and Doyle plots, the activation crystallization energy can be evaluated. During continuous heating, the activation energy increases with increasing of the crystallized volume fraction at the early stage of crystallization, then decreases slightly and finally drops sharply. The value of activation energy obtained from Kissinger plots is a bit larger than that obtained from Doyle plots due to the change of the crystallized volume fraction at the specific temperature for different heating rates.