A series of Ni/SBA-15 catalysts with Ni contents from 5 wt％-20 wt％ and CaO-12.5％Ni/SBA-15 catalysts with CaO contents from 1.4 wt％-9.8 wt％ have been prepared.The structure of the catalysts was characterized using X-ray diffraction (XRD),N2 adsorption-desorption,transmission electron microscopy (TEM) and X-ray photoelectron spectroscopy (XPS).The performance of catalytic steam reforming of the poplar leaves to the hydrogen-rich syngas was tested in a fixed-bed reactor.The results indicate that the 7.0wt％CaO-12.5wt％Ni/SBA-15 catalyst exhibits the best performance for the catalytic steam reforming of poplar leaves to hydrogen-rich syngas.The ratio of H2:CO can reach ca 5 ∶ 1 in the hydrogen-rich syngas.The yield of H2 can reach 273.30 mL/g (poplar leaves).In the CaO-Ni/SBA-15 catalyst,Ni active component mainly fills the role of catalytic steam reforming of the poplar leaves,and CaO active component mainly plays the role as water-gas shift and CO2 sorbent.