Abstract: Cinamaldehyde glycol acetal was synthesized from cinamaldehyde and ethylene glycol by using ferric sulphate-loaded silica gel (Fe2(SO4)3/SiO2) as catalyst. Factors influencing the synthesis were discussed and the optimum reaction conditions were found as follows: cinamaldehyde 0.1 mol, molar ratio of n(cinamaldehyde):n(ethylene glycol) 1.0:1.5,dosage of catalyst 2.0% of the feed stock, amount of cyclohexane 15 mL,reaction time 3.0 h. The yield can reach 83.2%.