Eighteen cyanoaniline derivatives were synthesized and there were 13 compounds having a chiral atom in them.The optical rotation and absorption curves were measured and it was found that the compounds having a chiral atom showed optical activity and the maximum absorption wavelengths of 18 synthesized compounds were between 400 and 415nm.Second harmonic generation(SHG)of synthesized compounds were measured by the powder method and it was found that 8 samples were revealed to possess SHU activity.The influence of the molecular structure on SHG was examined by X-ray crystal analysis.