Synthesis method of cinnamaldehyde

The invention belongs to the technical field of cinnamaldehyde and in particular relates to a synthesis method of cinnamaldehyde. The synthesis method of cinnamaldehyde comprises the following steps: dissolving benzaldehyde and acetaldehyde in a solvent to form a mixed solution, controlling the temperature to be 0-80 DEG C, carrying out condensation reaction on the mixed solution under catalysis of solid super base, adjusting a reaction solution after reacting to be neutral, carrying out reduced pressure distillation, collecting fraction under the pressure of 0.001-1MPa to obtain the cinnamaldehyde. The solid super base is used as a catalyst; the reaction selectivity is improved; the separation between the reaction solution and the catalyst is simplified; the reaction solution of cinnamaldehyde is relatively liable to separate; the synthesis method of the cinnamaldehyde is short in reaction time, high in conversation rate, excellent in selectivity and liable to separate, is capable of relatively simply preparing cinnamaldehyde and derivant series products, and has good application prospect.