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In this work,the hydrogenation of maleic anhydride to succinic anhydride in the presence of 5 m％Ni/clay catalysts was investigated.These catalysts were characterized by X-ray diffraction (XRD),H2 temperature programmed reduction (TPR) and thermogravimetric analysis (TGA) techniques.The XRD and TPR studies showed that Ni was present as Ni2+ on the support,which indicated that there were no elemental nickel (Ni0) and Ni2O3 species in the unreduced samples.Increasing of calcination temperature to 650 ℃ leads to destruction of the support structure observed in TGA,while the catalyst sample calcined at 550 ℃ exhibits better performances than other samples.The ideal conversion of maleic anhydride (97.14％) and selectivity of succinic anhydride (99.55％) were realized at a reaction temperature of 180 ℃ and a weight hourly space velocity of 4 h-1 under a reaction pressure of 1 MPa.