Pt-Co alloy supported on SBA-15 catalysts (Pt-Co/SBA-15) were prepared by impregnation and NaBH4 reduction method. Their catalytic performances were investigated for selective hydrogenation of cinnamaldehyde. It was found that the formation of Pt-Co markedly enhanced the conversion to cinnamaldehyde and selectivity to cinnamyl alcohol compared with Pt/SBA-15. Meanwhile, the Pt-Co/SBA-15-0.6 catalyst performed the best catalytic activity that 71 % CAL conversion and 91 % selectivity to COL were attained. Moreover, no obvious deactivation was observed after using 4 times for Pt-Co/SBA-15-0.6. This improvement was contributed to the formation of Pt-Co alloy, which increased the amount of the Pt-0 species on the catalysts. Pt-Co alloy supported on SBA-15 catalyst shows excellent catalytic selective hydrogenation of cinnamaldehyde to cinnamyl alcohol. [GRAPHICS]