Benzaldehyde and heptaldehyde as materials, the α-amyl cinnamaldehyde is synthesized in the presence of potassium fluoride on alumina. The sequence of the effects on reaction is benzaldehydegt;catalystgt;reaction temperaturegt;the dropping speed of heptaldehydegt;reaction time. The optimum production conditions are as follows: benzaldehyde: heptaldehyde: catalyst is 1.2 mol: 1.0 mol: 0.06 mol, the dropping speed of heptaldehyde is 6 h, reaction temperature is 60 °C, reaction time is 2 h. Under the optimum condition...