The invention relates to a method for synthesizing a 1,3-diphenyl-1-propanol compound, belonging to a method for synthesizing a compound. P-substituted 1-phenyl ethanol and p-substituted benzyl alcohol are used as raw materials, wherein R and R' are hydrogen atoms, halogen atoms Cl, Br, alkyl and alkoxy, and the adding ratio of the substituted 1-phenyl ethanol to the substituted benzyl alcohol is1: (1-2). The method comprises the following steps of: sequentially adding a dry catalyst, alkali, substituted1-phenyl ethanol and substituted benzyl alcohol into an anhydrous solvent under the condition of nitrogen, placing a reactor into an oil bath of 125 to 135 DEG C, and stirring for 8 to 24 hours; cooling, neutralizing the reaction solution, performing extraction by using ethyl acetate, andconcentrating the extract in vacuum till no ethyl acetate smell; and performing chromatographic purification by using a positive silica gel column of 100 to 200 meshes. The invention has the advantages of simple, convenient and feasible method, low production cost, reduced difficulty of purification and post treatment and weakened influence on the environment.