The Ni-based catalyst used in fluidized bed methane dry reforming reaction needs to have both high abrasion resistance and high activity, which requires the catalyst support itself to have both good abrasion-resistance and high Ni loading capacity. Based on the phase transformation mechanism of Al2O3, this study aims to prepare a type of core-shell @Al2O3 support with its shell in abrasion-resistant α-phase and its core in porous γ- or θ-phase Al2O3 through calcination of γ-Al2O3 at high temperatures. For this purpose, commercially available mesoporous γ-Al2O3 particles with a specific surface area of 325 m2/g and an average particle size of 850 μm were used as precursor material and calcinated in a vertical high temperature furnace at different temperatures for different periods of time. For prepared @Al2O3 samples, X-ray diffraction (XRD) analysis and N2 isothermal adsorption-desorption measurement were performed to characterize their phase transformation degree; electron microscopy (SEM) observation of their particles' cross-sections was conducted to confirm the formation of core-shell structure. And cold- and hot-state fluidized bed abrasion tests were carried out to evaluate their abrasion-resistance. The XRD results obtained have shown that the target core-shell @Al2O3 support can be prepared by calcination of porous γ-Al2O3 particles at 1250, 1300, and 1370℃ for different periods of time. SEM and BET characterization results also confirmed that the core-shell @Al2O3 particles with a shell thickness of 30~50 μm, a specific surface area of 86 m2/g and an average pore size of 22 nm were successfully prepared by calcination at 1300℃ for 6 min. The results of the fluidized-bed abrasion tests further confirmed that this core-shell @Al2O3 had the same excellent abrasion resistance as α-Al2O3, and the rate of its weight loss by abrasion at 800℃ was only 0.003wt%/h. At last, with this core-shell @Al2O3 as support, 10wt%Ni@Al2O3 catalyst was prepared in an impregnation approach and its abrasion resistance was evaluated at 800℃ to confirm that it also had the same resistance as α-Al2O3, which strongly suggests that such @Al2O3 supported catalyst has a good application prospect in fluidized bed reactor systems.