Abstract: Alumina（Al2O3） is widely used as catalyst supporter in catalytic industry.Fata and oils hydrogenation catalyst often uses nickel as the active component and alumina as the supporter.In the process of preparation of Ni/Al2O3 catalyst，the best conditions of the supporter was obtained as follows：the supporter was added before co-precipitation reaction，supporter Al2O3 specific surface area was 340.6 m2/g，amount-of-substance ratio of Ni to Al2O3 was 5∶4，aging time was 45 min.Under these reaction conditions，the catalyst activity was the highest and its application effect was the best.

Key words: supporter, Al2O3, nickel, catalysts