Kissinger, Ozawa and MKN methods were adopted to study the effect of Fe/Co ratios on the crystallization behavior in (FexCo1-x)72B19.2Si4.8Nb4 bulk amorphous alloys. The results show that when x ranges from 0.3 to 0.7, the as-cast (FexCo1-x)72B19.2Si4.8Nb4 alloy rods with a diameter of 2 mm are in an amorphous state. The glass transition temperature Tg, onset temperature of crystallization Tx and crystallization peak temperature Tp move towards to the higher temperature regions with increasing the heating rates. The result differences of activation energies calculated by Kissinger, Ozawa and MKN methods are not too much, among which, the results calculated by Kissinger and MKN methods are slightly larger than those calculated by Ozawa method and Ex>Ep>Eg. With increasing the Fe content, the apparatus crystallization activation energy Ex increases firstly, and then decreases, while the maximum value of local crystallization activation energy Eo presents a decline trend