Fuel cooling ability is highly critical to advanced aircraft, so it is of great urgency to develop high-performance endothermic fuel and related reaction technology. Based on the characteristics of alcohol promoting the pyrolysis of heavy oil and improving the selectivity of low carbon olefins, we propose to couple the catalytic cracking of hydrocarbon fuel with ethanol transformation to improve the heat-absorbing capability. A variety of coating catalysts were prepared on a high-temperature alloy tube using a slurry coating method. Endothermic reaction performances were evaluated on a self-made electric heating reaction evaluation apparatus. The research found that, under low and medium temperatures, the Ni/ZSM-5 coating can significantly promote the dehydration of ethanol to produce ethylene, and the heat sink of mixed fuel is increased by about 20% at 510 ℃. At higher temperatures, the water removed from ethanol participates in the steam reforming reaction to promote fuel heat absorption. A homogeneous additive can also work synergistically with the coating catalyst to show a good coking inhibition performance via improving the stable operating temperature and give a maximum heat sink of 3.71 MJ·kg^-1 at 791 ℃. These results provide a strong reference for the future design of the actively cooling scheme of aircraft.