The combustion characteristics of aluminum/ice fuel which was prepared by using micron-aluminum powder gradually replacing part of nano-aluminum powder were studied by surface contact method and high-speed photography technique. The results showed that the combustion reaction rate and violence of the reaction of aluminum/ice fuel first increased and then decreased with increasing of replaced amount of micro-aluminum. When the replaced amount of micron-aluminum powder reached about 30%, the maximum heating rate was up to 6062.24℃/s, being 3.8 times faster than the pure nano-aluminum/ice fuel. The burning surface propagation rate of aluminum/ice fuel was improved to different degrees when the micron-aluminum powder replaced the part of nano-aluminum powder. When the replaced amount of micron-aluminum powder reached approximate 20%, the combustion performance of aluminum/ice fuel was the best. Furthermore, the burning surface propagation rate was increased by 57.8% over that of pure nano-aluminum/ice fuel. On the basis of the above analysis, the combustion flame model of aluminum/ice fuel was established.