Provided are an arylamine alkyl sulfide compound with the structure similar to ruzadolane and a preparation method of the compound. The compound is obtained by adding Ar<1>-X1, a compound shown as a general formula III, Ar<2>-X2 and a sulfur source into solvent to completely react under heating according to a reaction equation (1), or the compound is obtained by adding Ar<1>-X1, the compound shown as the general formula III and Ar<2>-S<->M<+> into the solvent to completely react under heating according to a reaction equation (2). The method is easy to operate, efficient and mild in reaction condition, and all the used reagents are low in price, easy to obtain, high in safety and suitable for industrialized mass production.